人教版（2024）八年级上册（2024）Unit 4 Amazing Plants and Animals Section B精品课时练习

这是一份人教版（2024）八年级上册（2024）Unit 4 Amazing Plants and Animals Section B精品课时练习，文件包含第一章机械运动单元测试卷docx、第一章机械运动单元测试卷含答案解析docx等2份试卷配套教学资源，其中试卷共20页， 欢迎下载使用。
重点词汇解析
cnnect /kəˈnekt/ v. 关联；连接
cnnected /kəˈnektɪd/ adj. 连接的；相关的
cnnectin /kəˈneksn/ n. 联系；连接
[词汇拓展] uncnnected (adj.)不相关的，无联系的；discnnected(adj.)分离的；断开的；无关联的
[词汇搭配] 将...与...连接起来；cnnect (up)使...连接，接通
*be cnnected with / t 与……相连；与……有关联
a direct/clse/strng cnnectin with sth 与某事有直接的 / 密切的 / 牢固的联系
in cnnectin with sb/sth与…有关（或相关）
[词汇例句] She cnnected up the tw cmputers. 她把两台计算机连接起来。
Yu can cnnect the new wrds with picture t help yu remember them. 你可以把新单
词和图片联系起来，以帮助你记住它们。
[随学随练]
用cnnect的适当形式填空。
S yu see, a cup f tea cnnects different places.
He wanted t make a cnnectin with the lcal envirnmental grup t help imprve the situatin.
The reading buddies(伙伴) felt mre cnnected as they ften met each ther.
withut /wɪˈðaʊt/ prep. 没有；缺乏
[词汇拓展] with (prep.)携带，具有
[词汇搭配] withut ding sth.不做某事
[词汇例句] He left withut saying gdbye. 他不辞而别。
Try t eat dinner tgether withut phnes r TV. 试着在没有手机或电视的情况下一起
吃晚饭。
[随学随练]
单项填空。
—Mr. Wang went ut the rm withut ________ a wrd.
—Maybe he was angry.
A．sayB．saidC．sayingD．says
【答案】C
【详解】句意：——王先生走出房间，没说一句话。——也许他生气了。
考查非谓语动词。句中“withut”为介词，后面跟动名词作宾语，故选C。
imagine /ɪˈmædʒɪn/ v. 想象；猜想
[词汇拓展] imaginative(adj.)有想象力的；imaginatin(n.)想象；想象力
[词汇搭配] imagine ding...想象做某事
[词汇例句] Imagine studying in a quiet library with yur best friends. 想象一下，和你最好的朋友在
一个安静的图书馆学习。
[随学随练]
单项填空。
It was really hard fr peple t imagine ________ at hme twenty years ag.
A．shppingB．shppedC．shpD．t shp
【答案】A
【详解】句意：二十年前，人们真的很难想象在家购物。
考查非谓语动词。“imagine ding sth.是固定搭配，意为“想象做某事”，所以此处要用动名词形式。故选A。
disappinted /ˌdɪsəˈpɔɪntɪd/ adj. 失望的；沮丧的
disappint /ˌdɪsəˈpɔɪnt/ v. 使失望；使破灭
[词汇拓展] disappinting(adj.)令人失望的；disappintment(n.)失望
[词汇搭配] be disappinted at/by/with sth.对某事/某物失望
be disappinted in/with sb.对某人失望的
be disappinted t d...做某事很失望
[词汇例句] I was disappinted with the film. I had expected it t be much better.我对这部电影感到失
望。我原以为会好得多。
[随学随练]
用disappinted 的适当形式填空。
After he heard the disappinting wrds, he std up and managed a smile t cver up his sadness.
We must accept disappintment in ur life, and we must never lse heart.
He can’t finish his task n time and makes the bss disappinted.
I hate t disappint yu, but I'm just nt interested.
actin /ˈækʃn/ n. 行动；行为
[词汇拓展] act(v.)行动；active(adj.)积极的；actively(adv.)积极地
[词汇搭配] take actin t d 采取行动做某事
Actins speak luder than wrd. (saying)行动比言语更为响亮
in actin在活动中；在运转；ut f actin不能工作；失去作用；停止运转
[词汇用法]
actin表示“行动，行为过程”时，是不可数名词。
We need t take actin at nce. 我们要立刻采取行动。
actin表示“所做之事，行为”时，是可数名词。
As always, Peter had a reasn fr his actin.一如往常，彼得对自己的行为总有说辞。
[随学随练]
单项填空。
________ and wrk hard fr it, and yu will get whatever yu want.
A．Take ffB．Take actinC．Take upD．Take place
【答案】B
【详解】句意：采取行动并为之努力，你就会得到你想要的任何东西。
考查动词短语。Take ff起飞，脱掉；Take actin采取行动；Take up占据，开始从事；Take place发生。根据“and wrk hard fr it, and yu will get whatever yu want.”可知，此处是在鼓励人们采取行动并为之努力，所以应该用Take actin。故选B。
Many teenagers are having pr eyesight nw, s parents shuld take actin ________ the prblem frm getting wrse.
A．t stpB．stppingC．stppedD．stp
【答案】A
【详解】 句意：现在许多青少年视力不好，所以父母应该采取行动阻止问题变得更糟。
考查非谓语动词。根据“s parents shuld take actin…the prblem frm getting wrse.”可知，“采取行动”的目的是“阻止问题变糟”，因此此处需用不定式作目的状语。故选A。
per cent /pəˈsent/ (= percent) n. 百分之…… adj. & adv. 每一百中
[词汇搭配] 80 per cent 百分之八十
[词汇用法]
分数的表达
英语中表达分数时，分子用基数词，分母用序数词。如“五分之一”表示为ne fifth。
当分子大于1时，分母用复数形式。如“六分之五”表示为five sixths。
百分数用“基数词+per cent/percent”表示。如：“90%”表示为ninety percent。
注意：“百分数+名词”作主语时，其后的谓语动词与名词单复数保持一致。如：
70 per cent f the water in the village is frm the big river. 这个村子70%水来自这条大河。
40 percent f the students are frm the city. 40%的学生来自城市。
特殊的分数表达：“二分之一”表示为ne half；“四分之一”表示为ne quarter；“四分之三 ”
表示为three quarters。
[随学随练]
单项填空。
There are 20 bys and 30 girls in ur class. S ________ f the students are bys.
A．thirty percentB．frty percentC．fifty percentD．sixty percent
【答案】B
【详解】句意：我们班有20名男生和30名女生，因此男生占学生的百分之四十。
考查百分比计算。thirty percent百分之三十；frty percent百分之四十；fifty percent百分之五十；sixty percent百分之六十。总学生数为20（男生）+30（女生）=50人，男生占比为(20/50)×100%=40%。故选B。
Nearly ________ f the earth is cvered by sea, but 95 percent f it ________ salty water.
A．three furth; isB．three furths; isC．three furth; areD．three furths; are
【答案】B
【详解】句意：地球将近四分之三被海水覆盖，但是95%的水是咸水。
考查分数表达法以及主谓一致。分子用基数词，分母用序数词。分子大于一，分母用复数。“四分之三”的表达方式为three furths，排除A和C；“分数/百分数+f+名词”作主语时，谓语动词与名词保持一致，本句话中it代指earth，be动词用is，故选B。
planet /ˈplænɪt/ n. 行星
[词汇拓展] star (n.)恒星；星星
[词汇搭配] the planet 地球（尤指环境）
[词汇例句] The picture shws six f the eight planets in the slar system.这幅图标示了太阳系八大行
星中的6颗。
stre /stɔː(r)/ v. 贮存；存储 n. 百货商店；商店
[词汇拓展] strage(n.)贮存
[词汇搭配] a health fd stre保健食品商店；stre hney贮存蜂蜜；stre away/up存储
in stre (fr sb) 即将发生（在某人身上）；等待着（某人）
set/put (great, etc.) stre by sth（十分）看重，重视（某事物）
[词汇例句] They think it'll be easy but they have a surprise in stre .他们以为事情容易，到时候他们
会吃惊的。
She sets great stre by her appearance.她十分看重自己的外貌。
cmmunicate /kəˈmjuːnɪkeɪt/ v. 交流；沟通
[词汇拓展] cmmunicatin(n.)沟通，交流；cmmunicatr沟通的人；交流者
[词汇搭配] cmmunicate with与...交流
[词汇例句] He cmmunicated with them with pen and paper. 他用笔和纸与他们交流。
[随学随练]
单项填空。
—WeChat ________ makes a great difference t ur everyday life.
—S it des. It is easier fr peple t ________ with thers.
A．mstly; talkB．pssibly; speakC．hardly; chatD．exactly; cmmunicate
【答案】D
【详解】句意：——微信确实对我们的日常生活有很大影响。——的确如此。人们与他人交流更容易了。
考查副词和动词辨析。第一空：mstly主要地；pssibly可能地；hardly几乎不；exactly确实、确切地。根据“S it des.”可知，此处强调微信确实有很大影响，“exactly”符合语境； 第二空：talk谈话，侧重交流；speak说，侧重语言能力；chat聊天，较随意；cmmunicate交流，强调信息传递。cmmunicate with thers表示“与他人交流”，符合语境。 故选D。
prtect /prəˈtekt/ v. 保护；防护
[词汇拓展] prtectin(n.)保护；prtectr(n.)保护者；unprtected(adj.)未受保护的
[词汇搭配] prtect ... frm/against... 保护...免受...的伤害；prtect the envirnment保护环境
[词汇例句] Everyne shuld play a part in prtecting the envirnment. 人人都要保护环境。
[随学随练]
单项填空。
—Wearing gggles (护目镜) when yu are swimming. It’s a gd way t ________ yur eyes frm being injured.
—OK. Mm.
A． prtect B．hldC．saveD．stp
【答案】A
【详解】句意：——游泳时要戴护目镜。这是保护眼睛免受伤害的好方法。 ——好的，妈妈。
考查动词辨析。prtect保护；hld保持；save拯救；stp阻止。根据“yur eyes frm being injured.”可知，“护目镜”用于保护眼睛，prtect…frm…“保护……免受……”，故选A。
Yu can prtect yurself ________ wearing this mask in the sandstrm.
A．frmB．againstC．frD．by
【答案】D
【详解】句意：在沙尘暴中，你可以通过佩戴这个口罩来保护自己。
考查介词辨析。frm来自；against反对；fr为了；by通过。根据“prtect yurself ... wearing this mask”可知，此处强调保护自己的方式是戴口罩，表示方式用介词by。故选D。
imprtance /ɪmˈpɔːtns/ n. 重要性
[词汇拓展] imprtant(adj.)重要的
[词汇搭配] be f great/much imprtance 非常重要；the imprtance f... ...的重要性
[词汇例句] State yur reasns in rder f imprtance .按重要性顺序陈述你的理由。
[随学随练]
单项填空。
It’s ________ t understand the ________ f health.
A．imprtant; imprtantB．imprtant; imprtance
C．imprtance; imprtantD．imprtance; imprtance
【答案】B
【详解】句意：理解健康的重要性是很重要的。
考查形容词和名词的用法。imprtant重要的，形容词，在句中作表语；imprtance重要性，名词，在句中作understand的宾语，the imprtance f...是固定搭配，表示“……的重要性”。根据“It’s”可知，第一空需填形容词imprtant；根据“ health”可知，第二空需填名词imprtance。故选B。
human /ˈhjuːmən/ n. 人 adj. 人的；人类的
[词汇搭配] the human bdy人体；human being人类
[词汇例句] Dgs can hear much better than humans. 狗的听觉比人灵敏得多。
happiness /ˈhæpinəs/ n. 幸福；快乐
[词汇拓展] happy(adj.)快乐的；happily(adv.)快乐地；unhappy(adj.)不快乐的；unhappily(adv.)不快
乐地
[词汇例句] She fund happiness in her later years. 她在晚年才寻得幸福。
[随学随练]
用happy的适当形式填空。
He likes t share his happiness with his friends.
The by likes cmputer games. Playing cmputer games makes him feel happy.
Mrs King lked unhappy because many students arrived late.
Then ne day, my classmates talked happily with their friends, but I sat at my desk unhappily as usual.
tn /tʌn/ n. 吨
[词汇搭配] tns f 大量，许多；weigh a tn 重达一吨
[词汇例句] There are tns f bks in ur new library.我们的新图书馆有大量的书。
rle /rəʊl/ n. 作用；职能；角色
[词汇搭配] play an imprtant rle in在...发挥重要作用；the leading rle主角；rle mdel榜样
[词汇例句] She refused t take n the traditinal wman's rle.她拒绝承担传统妇女的角色。
climate /ˈklaɪmət/ n. 气候
[词汇搭配] climate change 气候变化；a pleasant climate宜人的气候
[词汇例句] Many animals are in danger because f climate change.由于气候变化很多动物处于危险中。
cean /ˈəʊʃn/ n. 大海；海洋
[词汇拓展] the Pacific Ocean太平洋；the Arctic Ocean北冰洋
the Atlantic Ocean大西洋；the Indian Ocean印度洋
[词汇搭配] an cean f...许多，大量；a drp in the cean沧海一粟；九牛一毛
[词汇例句] Millins f tns f plastic enters the cean every year. 每年有数百万吨塑料进入海洋
except /ɪkˈsept/ prep. 除……之外；除了
[词汇辨析]
except / besides / except fr
except引出陈述中唯一不适用的事物、情形、人或想法。
All f his bdy relaxed except his right hand除了右手外，他全身都放松了。
besides用来引出除已经提到的事物之外的其他事物。
Fruit will give yu, besides enjyment, a surce f vitamins水果不但好吃，而且富含维生素。
except fr 用于引出使某陈述不能完全成立的事物。
Except fr ne ld lady, the bus was empty. 除了一位老太太，汽车是空的。
[随学随练]
单项填空。
—Did yu study any ther language ________ English when yu were at cllege?
—Yes, I studied three. But I have frgtten all ________ a few wrds f each.
A．except; besidesB．but; exceptC．besides; except
【答案】C
【详解】句意：——你在大学时除了英语还学过别的语言吗？——是的，我学了3种。但除去几个单词外，我都忘记了。
考查介词辨析。besides除……之外（还有）；but除了；except除……之外（不再有）。根据“Did yu study any ther when yu were at cllege?”可知，问句询问的是“除了学英语以外，还学了其他的语言吗”，即英语是包含在内的，空处应是besides，排除选项A和B；而回答者把学过的都忘了，只记住几个单词，这几个单词不在遗忘的范围内，结合选项，第二空填except。故选C。
tiny /ˈtaɪni/ adj. 极小的；微小的
[词汇拓展] tinier； tiniest
[词汇搭配] the tiniest animals in the cean大洋中最微小的动物
[词汇例句] The living rm is tiny.起居室非常小。
lively /ˈlaɪvli/ adj. 精力充沛的；生机勃勃的
[词汇搭配] a lively and healthy ecsystem 一个充满活力和健康的生态系统
[词汇辨析]
lively / alive / living / live
lively意为“生动的”，“活泼的”，“充满生气的”，用作表语或定语，可以用来修饰人或物。
She had a sweet, lively persnality. 她的性格可爱活泼。
alive是表语形容词，作“活着的”，“在世的”解，它既可以修饰人也可以修饰物。作定语时要后置。
The cheetah is alive. 猎豹是活的。
Is the snake alive r dead ? 这条蛇是活的还是死的？
living意为“活着的”，主要用作定语，常置于名词之前，有时也可置于名词之后，也可用作表语。
He is ne amng the living men. 他是那些活着的人之一。
The injured man is living. 那位受伤的男人还活着。
live读作/laɪv/，意为“活着的”，可以作定语，放在所修饰的名词之前，一般不用来修饰人。
He saw a live snake. 他看见了一条活的蛇。
[随学随练]
单项填空。
“In this __________ seasn f early summer when every _______ thing is full f energy, I wish t welcme all f yu!” said Chinese President Xi Jinping at the pening ceremny f BRF.
A．alive; livingB．lively; alive
C．lvely; livingD．live; lving
【答案】C
【详解】句意：在这个初夏可爱的季节里，每一种生物都充满活力，我衷心欢迎你们所有人！考查形容词辨析题。alive 意为"活着的、有活力的",是表语形容词，可修饰人、物；living 意为"活着的、有生命的"，主要用于作前置定语及冠词the 之后表示一类人，也可用作表语，可修饰人或物；lively 意为"活泼的"，"有生气的"，可用作表语、定语，指人或物；lvely意思是"可爱的"，"美好的"；live指的是（动、植物）"活的"，"有生命的"，"活生生的，主要用来说鸟或其它动物，作前置定语。前空后面名词seasn季节，和alive、living、lively与live均不搭配，需用lvely修饰，every强调全部，根据full f energy充满活力，可知本句主语是“每一个有生命的事物”即生物living thing，故选C。
重难句型解析
“ne f the +形容词最高级+复数名词”结构
(教材原文)We need each ther t live,and bees are ne f the best examples f this cnnectin.我们需要彼此生存，而蜜蜂就是这种联系的最佳例子之一。
(教材原文)Bees are als ne f the mst interesting animals in the wrld.蜜蜂也是世界上最有趣的动物之一。
“ne f the +形容词最高级+复数名词”结构表示“最...的...之一”，是常用的最高级结构之一。
[随学随练]
单项填空。
The Yellw River is ne f ________ in China.
A．the lngest riverB．the lngest riversC．lnger riversD．lnger river
【答案】B
【详解】句意：黄河是中国最长的河流之一。
考查形容词最高级。根据“The Yellw River is ne f …in China.”可知，此处为固定结构ne f+the+形容词最高级+名词复数，表示“最……之一”。故选B。
as/when引导时间状语从句
(教材原文)As they fly frm ne flwer t anther, they take pllen with them.当它们从一朵花飞到另一朵花时，它们会带走花粉。
(教材原文)When a blue whale dies at sea, it becmes fd fr many kinds f animals living in and arund the sea.当一头蓝鲸在海里死亡时，它就成为生活在海中和周围的许多动物的食物。
as用作连词引导时间状语从句，一般强调主从句动作同时发生且持续进行。
when引导时间状语从句时，从句的动词可以在主句动作之前、之后或同时发生。
when和as有时可以替换使用。当as表示“随着...”不能用when替换。
Yu shuld pay attentin t the traffic lights as/ when yu crss the rad. 你过马路时要注意红绿灯。
As the day went n, the weather gt wrse. 随着时间推移，天气变得更糟糕了。
[随学随练]
单项填空。
—_________ time ges n, her illness gets wrse and wrse.
—She is always a strng-minded lady. Hpe a miracle will happen.
A．WhenB．WhileC．OnceD．As
【答案】D
【详解】句意：——随着时间的推移，她的病情越来越严重。——她一直是一个意志坚强的女士。希望奇迹会发生。
考查连词辨析。When当……时；While当……时；Once一旦；As随着。根据“ ges n, her illness gets wrse and wrse.”可知，随着时间的推移，她的病情加重，用as引导时间状语从句。故选D。
I was reading a bk in the library ________ a friend f mine came t sit next t me.
A．befreB．whileC．whenD．if
【答案】C
【详解】句意：我正在图书馆看书，这时我的一个朋友过来坐在我旁边。
考查连词辨析。befre在……之前；while当……时候；when当……时候；if如果。根据“I was reading a bk in the friend f mine came t sit next t me.”可知，主句是过去进行时，从句动词came为瞬间动作，应用when引导时间状语从句，表示“读书”被“朋友来”打断。故选C。
宾语从句
(教材原文)Fr this reasn, many scientists believe that bees are the mst imprtant animals n this planet.出于这个原因，许多科学家认为蜜蜂是地球上最重要的动物。
(教材原文)Think abut what yu can d t prtect ne f the mst amazing animals n earth.想想你能做些什么来保护地球上最神奇的动物之一。
(教材原文)When a bee finds new fd, it uses a dance t tell the thers where and hw far away the fd is.当蜜蜂找到新的食物时，它会用舞蹈告诉其他蜜蜂食物在哪里，有多远。
第一句中that引导宾语从句，that没有意义，且在从句中不充当任何成分。
第二句中what引导宾语从句，what是连接代词，在从句中充当主干成分。
第三句中where和hw far引导宾语从句，where和hw或hw短语是连接副词，在从句中充当状语成分。
[随学随练]
单项填空。
—What did yur sister say?
—She said ________ she wuld leave the message n the answering machine.
A．thatB．ifC．whetherD．what
【答案】A
【详解】句意：——你姐姐说了什么？——她说她会把留言留在自动应答机上。
考查宾语从句的引导词。that无实际意义，在宾语从句中不充当成分，可省略；if是否；whether是否；what什么，在宾语从句中作主语、宾语或表语。分析句子可知，答句中“she wuld leave the message n the answering machine”是宾语从句，该从句结构完整，不缺任何成分，且不需要“是否”的疑问含义，因此应用that引导。故选A。
I dn’t understand ________ yu said.
A．whatB．thatC．whichD．hw
【答案】A
【详解】句意：我不理解你所说的。
考查宾语从句引导词。what什么；that那个，引导名词性从句时不作成分；which哪一个；hw如何。此处从句缺少宾语，需用“what”指代“你所说的内容”。故选A。
Culd yu please tell me ______ the nearest bus stp is?
A．thatB．ifC．whereD．when
【答案】C
【详解】句意：你能告诉我最近的公共汽车站在哪里吗？
考查宾语从句的引导词辨析。that那个；if是否；where哪里；when什么时候。根据“ nearest bus stp is”可知，问的是最近的公共汽车站在哪里，从句中缺少地点状语。故选C。
表语从句
(教材原文)Anther interesting thing abut bees is hw they cmmunicate.关于蜜蜂的另一个有趣的事情是它们如何交流。
此句中hw they cmmunicate是hw引导的从句，位于系动词is后，是一个表语从句。
再比如：My advice is that yu shuld stay here fr sme days. 我的建议是你在这待一些天。
其他重要知识点讲解
“基数词+percent f +n.”
(教材原文)In fact, withut their wrk, abut 80 per cent f the plants in the wrld cannt grw.事实上，如果没有他们的工作，世界上大约80%的植物将无法生长。
表示“百分之...”用基数词+percent f +n.结构。其后的谓语动词与名词单复数保持一致。
in rder t用法
(教材原文)In rder t stre hney, they create hneycmbs.为了储存蜂蜜，他们创造了蜂巢。
in rder t 表示“为了..，目的是...”，其后接动词原形。
近似表达为in rder that，但in rder that后接从句，相当于s that引导目的状语从句。
比如：In rder that we get there n time, we shuld set ut early.为了准时赶到那里，我们应该早点出发。
[随学随练]
单项填空。
Sally studies hard in rder t ________ a gd university.
A．gets intB．get intC．gt intD．getting int
【答案】B
【详解】句意：为了进入一所好大学，Sally努力学习。
考查非谓语动词。in rder t d sth.“为了做某事”。故选B。
She dressed up ________ everyne might ntice her.
A．in rder tB．in rder that
C．althughD．because f
【答案】B
【详解】句意：她精心打扮以便大家都能注意到她。
考查目的状语从句。in rder t为了，后接动词原形；in rder that为了，后接从句；althugh尽管，引导让步状语从句；because f是介词短语，后跟名词或名词性短语表示原因。根据“everyne might ntice her.”可知精心打扮是为了大家都能注意到她，应用in rder that引导目的状语从句，故选B。
the number f 用法
(教材原文)Hwever, the number f bees is drpping, and scientists are wrried.然而，蜜蜂的数量正在下降，科学家们对此感到担忧。
the number f... 表示“的数量”，作主语时，谓语动词用单数形式。而a number f...表示“很多，大量”，其后接可数名词复数形式，作主语时，谓语动词用复数。
比如：A number f students are playing basketball.许多学生在打篮球。
[随学随练]
单项填空。
—D yu knw ________ mney we need t buy the materials fr the schl event?
—Well, we need t buy ________ things, s it might be a bit expensive.
A．hw many; a number fB．hw much; a number f
C．hw many; the number fD．hw much; the number f
【答案】B
【详解】句意：——你知道我们需要多少钱来购买学校活动的材料吗？——嗯，我们需要买很多东西，所以可能有点贵。
考查疑问词组和短语辨析。hw many多少，后接可数名词复数；hw much多少，后接不可数名词；a number f许多，后接可数名词复数；the number f……的数量。根据“mney”可知是不可数名词，第一空用hw much；再由“things”可知是很多东西，第二空用a number f。故选B。
The number f the teachers ________ 80 and a number f them ________ kind.
A．is; areB．are; isC．are; areD．is; is
【答案】A
【详解】句意：教师的数量是80，并且他们中的许多人都很友善。
考查主谓一致。第一空，“the number f+可数名词复数”表示“……的数量”，作主语时，谓语动词用单数形式，要用is；第二空，“a number f+可数名词复数”表示“许多……”，作主语时，谓语动词用复数形式，要用are。故选A。
while表示“对比”
(教材原文)The smallest frgs are abut the size f a pea, while larger nes can grw as big as a human hand.最小的青蛙只有豌豆大小，而较大的青蛙可以长到人的手掌大小。
此句中while用作连词，表示“对比”。
基础知识综合练习
根据提示填写正确形式的单词，每空一词。
He (存储) (两顿)f ptates last year.
【答案】 stred tw tns
The earth is a (行星) and it ges arund the sun.
【答案】planet
There are many different cell types (细胞类型) in the ________ (人类的) bdy.
【答案】humans
(事实上), he stays up late t play cmputer games.
【答案】 In fact
Parents (起着重要作用) their children’s educatin.
【答案】 play an imprtant rle in
Playing cmputer games fr a lng time is bad fr eyesight. (出于这个原因), my parents limit my screen time.
【答案】 Fr this reasn
The Amazn rainfrest (有...栖息) millins f different plant and animal species.
【答案】 is hme t
Bamb is (最受欢迎的题材之一)in Chinese paintings.
【答案】ne f the mst ppular subjects
Human survival(生存) (与...有关联)a healthy envirnment.
【答案】 is cnnected with
(为了使) her rm tidy, Lily cleans it every evening.
【答案】 In rder t make
Sme trtises can (活到) 200 years if the envirnment is gd.
【答案】 live up t
Our plan f prtecting the envirnment will be successful if everyne (参与)it.
【答案】 plays a part in
(气候变化)affects ur planet, s we shuld take actin nw.
【答案】Climate change
If everybdy (采取行动), the wrld will be greener and mre beautiful.
【答案】 takes actin will be
We realize (...的重要性) helping each ther in daily life.
【答案】the imprtance f
用所给词的正确形式填空或者根据句意填写适当的单词使句意通顺。
Alice wants t buy a pair f sunglasses t prtect herself the sun.
【答案】frm/against
Can yu imagine (dance) in the middle f yur rm?
【答案】dancing
Miss Li is reading her textbk carefully withut (ntice) me enter the teacher’s ffice.
【答案】nticing
The mvie helps peple understand the (imprtant) f family.
【答案】imprtance
Many animals are in danger because climate change.
【答案】f
The students were (disappint) because they didn’t win the game.
【答案】disappinted
The bridge is strng enugh t supprt several (tn) f weight.
【答案】tns
There is a strng (cnnect) between hard wrk and success.
【答案】cnnectin
The Internet has prvided us with mre ways f (cmmunicate).
【答案】cmmunicatin
We shuld take (act) t prtect ur envirnment.
【答案】actin
Yesterday ur headmaster made a speech n envirnmental (prtect).
【答案】prtectin
Creating a paper-cut artwrk tgether can bring children a lt f (happy).
【答案】happiness
He seems even (tiny) than we thught.
【答案】tinier
As a (live) child, he enjys running arund the park and explring new things.
【答案】lively
The number f the students in ur schl ________ (be) 2,000, and frty per cent f them ________(be) girls.
【答案】is ; are
单项填空。
All f us were ________ when we watched the ________ match.
A．disappinted, disappintedB．disappinting, disappinting
C．disappinted, disappintingD．disappinting, disappinted
【答案】C
【详解】句意：当我们看了那场令人失望的比赛时，我们都很失望。
考查形容词辨析。disappinted失望的，修饰人；disappinting令人失望的，修饰物；第一空修饰主语人All f us，用disappinted作表语；第二空修饰物match，用disappinting作定语。故选C。
Smetimes life isn’t as perfect as we ________.We must accept disappintment in ur life, and we must never lse heart.
A．imagineB．cmmunicateC．mindD．cnnect
【答案】A
【详解】句意：有时候生活并不像我们想象的那么完美。我们必须接受生活中的不如意，并且永远不要灰心。
考查动词辨析。imagine想象；cmmunicate沟通；mind介意；cnnect连接。根据“We must accept disappintment in ur life”可知，我们必须接受生活中的不如意，因为生活不会像我们所想象的那么完美。故选A。
The number f the vlunteers in ur city ________ 3, 000. And fifty percent f them ________ students.
A．is; isB．are; isC．is; areD．are; are
【答案】C
【详解】句意：我们城市中志愿者的数量是3000人，其中百分之五十的人是学生。
考查主谓一致。the number f. . .作主语时，谓语动词用单数，因此第一空用is。百分数+名词作主语时，谓语动词要和百分数后的名词或代词保持一致，此处为 them，谓语用复数形式，因此第二空用are。故选C。
________ wear thick glasses, we shuld d what we can ________ ur eyes frm the sun and the screen (屏幕).
A．In rder nt t; t preventB．In rder t nt; prevent
C．In rder nt t; t prtectD．In rder t nt; prtect
【答案】C
【详解】句意：为了不戴厚眼镜，我们应该尽我们所能保护我们的眼睛免受阳光和屏幕的伤害。
考查非谓语及动词辨析。prevent阻止；prtect保护。根据“wear thick glasses”可知，此处是为了不戴厚眼镜，in rder nt t d“为了不做某事”，排除B、D；根据“we shuld d what we can ... ur eyes frm the sun and the screen”可知，“做我们能做的事情”是为了“保护眼睛免受阳光和屏幕的伤害”，此处用动词不定式作目的状语。故选C。
Abut seventy per cent f ur classmates ________ in the playgrund.
A．is playB．are playC．is playingD．are playing
【答案】D
【详解】句意：大约百分之七十的同学在操场上玩。
考查主谓一致。百分数修饰名词时，谓语的单复数与f后的名词单复数保持一致，“classmates”是复数，助动词用are，后接现在分词构成现在进行时结构，故选D。
David left the schl pp grup. Then I tk ver his ________ as lead singer.
A．farmB．partC．rleD．sale
【答案】C
【详解】句意：大卫离开了学校的流行乐队。然后我接替了他担任主唱的角色。
考查名词辨析。farm农场；part部分；rle角色；sale降价出售。根据“David left the schl pp grup. Then I tk ver lead singer.”可知，“我”接替了大卫担任主唱的角色。故选C。
Many butterflies are still ______________ after the lng winter days. Nw the frest is ______________.
A．lively; livelyB．alive; aliveC．alive; livelyD．lively; alive
【答案】C
【详解】句意：长长冬天后许多蝴蝶仍然活着，现在森林里是有生气的。根据alive活着的，有生命的， lively活泼的，生动的，可作定语和表语；根据句意故选C
The by gt sick because he ges t schl ______ having breakfast every mrning.
A．withut B．besides C．with D．except
【答案】A
【详解】句意：这个男孩生病了，因为他每天早上不吃早餐就去上学。
考查介词辨析。withut没有；besides除了，此外；with和；except除了。根据“The by gt sick because he ges t schl”可知，此处解释男孩生病的原因是上学不吃早餐。故选A。
DeepSeek, ne f ________ AI tls, is dwnladed freely and quickly n the Internet.
A．the mst ppularB．mre ppularC．mst ppularD．ppular
【答案】A
【详解】句意：DeepSeek是最受欢迎的AI工具之一，可以在互联网上免费快速下载。
考查形容词最高级用法。根据“ne tls”可知，此处是“ne f the+形容词最高级+名词复数”表示“最……之一”；因此空处用“the+形容词最高级”，ppular的最高级是mst ppular。故选A。
—Why did yu get up s early this mrning?
—________ catch the first bus t the airprt.
A．In rder tB．In rder thatC．S thatD．Because f
【答案】A
【详解】句意：——你今天早上为什么起这么早？——为了赶上去机场的第一班公交车。
考查短语辨析。In rder t为了，后接动词原形；In rder that为了，后接从句；S that为了，以便，后接从句；Because f因为，后接名词或名词短语。根据“catch the first bus t the airprt”可知，此处是表示目的，且catch是动词原形，所以应该用In rder t。故选A。
技能提升综合练习
听力选择
请听一段对话，回答下面三个小题。
1．What’s Amy ding nw?
A．Seeing a film.B．Watching a vide.C．Reading a bk.
2．Hw many Suth China tigers are there n the earth?
A．Abut 140.B．Abut 240.C．Abut 340.
3．Hw shuld we prtect the tigers accrding t Amy and Jack?
①By stpping peple frm killing them.
②By building tiger research bases.
③By prtecting their hmes in the wild.
A．①②B．①③C．②③
【答案】1．C 2．B 3．A
【原文】W: Hi, this is Amy speaking.
M: Hi, Amy. This is Jack. What are yu ding nw?
W: I am reading a bk.
M: What is the bk abut?
W: It’s abut Suth China tigers. It’s said that there are nly abut 240 Suth China tigers left n the earth.
M: Sunds terrible. What shuld we d t prtect them?
W: We shuld stp peple frm killing them.
M: Yu are right. We can als build Suth China tiger research bases and let mre peple knw abut them.
W: I agree. Let’s start frm nw n t let mre peple knw abut the Suth China tigers.
听独白，从题中所给的A、B、C三个选项中选出正确选项，回答问题。
4．Wh is at the tp f the fd chain (食物链)?
A．The lin.B．The shark.C．Peple.
5．What kind f animal is ne f the strngest animals n land?
A．The lin.B．The whale.C．The mnkey.
6．Is the shark ne f the mst dangerus animals in the sea?
A．Yes, it is.B．N, it isn’t.C．We dn’t knw.
7．Why are we facing danger?
A．Because there are t many dangerus animals in nature.
B．Because there are fewer animals and plants than befre.
C．Because there are t many peple.
8．What shuld we d t prtect urselves?
A．We shuld kill the lins and sharks.
B．We shuld prtect the animals and plants.
C．We shuld prtect the lins and sharks.
【答案】4．C 5．A 6．A 7．B 8．B
【原文】
There is a big fd chain in nature. Fr example, the lin may be ne f the strngest animals in the land fd chain. The shark is ne f the mst dangerus animals in the sea. Althugh there are all kinds f dangerus animals in nature, peple are at the tp f the whle fd chain. Because we can make the animals and plants ur fd if we want t. But we are facing danger as well. Lts f animals and plants are fewer than befre. S we shuld learn t prtect the animals and plants in nature. If we prtect animals and plants, we are prtecting urselves.
听下面的对话，回答下列小题。
9．Hw heavy is an rdinary cat?
A．A few kils.B．As heavy as a butterfly.C．As heavy as a man.
10．Which is the lngest living animal in the wrld?
A．A butterfly.B．A man.C．A giant turtle.
11．Hw lng can a butterfly live?
A．A few years.B．A few days.C．A few mnths.
【答案】9．A 10．C 11．B
【原文】A: Mm, d yu knw hw heavy a cat is?
B: I think an rdinary cat weighs abut a few kils.
A: And hw much des a butterfly weigh? Only a few grams, I’m sure.
B: Is man the lngest living animal in the wrld?
A: N, that’s a giant turtle. But a man can live fr nearly a hundred years. Nwadays, that’s quite lng.
B: And hw lng can a butterfly live? Can it live as lng as a man?
A: N, a butterfly nly lives fr a few days.

补全对话
A: Hi, Peter! Did yu watch the Wrld Service CCTV yesterday evening?
B: N, I didn’t. 1
A: Yes, there was. The African elephants are endangered (濒临灭绝的).
B: Really? 2
A: Peple killed a great number f elephants nly fr their tusk (象牙).
B: Was there anything abut the sharks? Hw abut them?
A: Their numbers drp greatly, t. 3
B: Why?
A: Because peple catch them fr their fins (鱼翅) t make shark fin sup.
B: 4 We are suppsed t try ur best t prtect these animals.
A: 5 Animals are imprtant t us. They are ur friends.
【答案】1．C 2．A 3．E 4．F 5．D
【分析】本篇对话难度适中，主要讲述非洲象以及鲨鱼濒临灭绝的原因，最后呼吁大家保护这些动物。
1．根据Yes, there was可知，应该用there be句型的一般疑问句，表示“有一些重要的事情吗？”，故选C。
2．根据The African elephants are endangered以及Peple killed a great number f elephants nly fr their tusk可知，应问“他们发生了是么事情？”，故选A。
3．根据Their numbers drp greatly, t以及Because peple catch them fr their fins (鱼翅) t make shark fin sup可知，鲨鱼的数量急剧减少，据说世界上几乎没剩下多少，故选E。
4．根据We are suppsed t try ur best t prtect these animals可知，表示“保持自然平衡很重要”，故选F。
5．根据We are suppsed t try ur best t prtect these animals以及Animals are imprtant t us. They are ur friends可知，表示“我同意你的观点”，故选D。
语篇填空
阅读下面短文, 在空白处填入一个适当的词, 或填入括号中所给单词的适当形式。
Frgs are amazing creatures that play 1 imprtant rle in ur ecsystem. Many peple knw they help farmers by eating insects. But d yu knw mre abut their 2 (cnnect) with nature?
First, let’s talk abut their grwth. After rain, mushrms and sme frgs 3 (appear) in gardens. In sme places, peple use bamb baskets t 4 (stre) fd, just like hw frgs find safe spts t live.
When we lse ur 5 (favurite) plants r animals, we may feel 6 (disappint). Frgs als face changes—their hmes are smetimes destryed. It’s hard t 7 (imagine) a wrld withut these little helpers.
Scientists study frgs t understand the 8 (imprtant) f prtecting ur planet. Even a small actin, like nt plluting water, can 9 (act) as a way t save them. Let’s all d ur part 10
(keep) frgs and nature in balance!
【答案】
1．an 2．cnnectin 3．appear 4．stre 5．favurite 6．disappinted 7．imagine 8．imprtance 509．act 5010．t keep
【导语】本文主要介绍了青蛙这一生物，围绕其生态作用、生长关联、生存现状及保护意义展开，旨在向读者普及青蛙对生态系统的重要性，并呼吁共同保护青蛙，维护自然生态平衡。
1．句意：青蛙是神奇的生物，在我们的生态系统中扮演着一个重要的角色。play a/an+形容词+rle“扮演……的角色”，固定搭配，而“imprtant”是以元音音素开头的单词，需用不定冠词an。故填an。
2．句意：但你是否更了解它们与自然的联系呢？空前形容词性物主代词their“它们的”后接名词，因此这里应用cnnect的名词形式cnnectin“联系”，此处指“与自然的关联”，用单数即可。故填cnnectin。
3．句意：雨后，蘑菇和一些青蛙出现在花园里。句子描述雨后常见的自然现象，需用一般现在时，且主语“mushrms and sme frgs”为复数，谓语动词应用原形。故填appear。
4．句意：在一些地方，人们用竹篮储存食物，就像青蛙寻找安全的地方居住一样。use sth. t d sth.“用某物做某事”，固定搭配，因此这里应用动词原形stre“贮存，储藏”。故填stre。
5．句意：当我们失去最喜爱的植物或动物时，我们可能会感到失望。分析句子结构可知，这里应用形容词favurite“最喜欢的”，在句中作定语，修饰“plants r animals”。故填favurite。
6．句意：当我们失去最喜爱的植物或动物时，我们可能会感到失望。空前“feel”是系动词，后接形容词作表语，且主语是人(we)，需用修饰人的形容词disappinted“感到失望的”。故填disappinted。
7．句意：很难想象一个没有这些小帮手 (指青蛙) 的世界。分析句子结构可知，此处考查It’s hard t d sth.“很难做某事”，固定句型，其中“It”为形式主语，真正的主语是后面的动词不定式结构；空前为动词不定式符号t，因此这里应用动词原形imagine“想象”。故填imagine。
8．句意：科学家研究青蛙以理解保护我们星球的重要性。根据“the … f”可知，此处是指“……的重要性”，应用imprtant的名词形式imprtance“重要性”，不可数。故填imprtance。
9．句意：即使是一个小行动，比如不污染水，都可以作为拯救它们的一种方式。空前情态动词“can”后接动词原形，因此这里应用动词原形act。故填act。
10．句意：让我们都尽自己的一份力来保持青蛙与自然的平衡！d ne’s part t d sth.“尽某人的职责去做某事”，固定搭配，因此这里应用动词不定式表目的。故填t keep。
完形填空
The Little Helpers in Gardens
In my hmetwn, there’s a small garden full f life. Many creatures live here and 1 an imprtant rle in keeping it beautiful.
Every summer, mushrms 2 in the garden after rain. They lk like little umbrellas and mean a lt t the sil—they help make it rich. Kids lve t find them, but sme are pisnus, s adults always 3
them nt t tuch.
Frgs als live here. They are nt 4 a human hand, but they are great helpers. They keep pests away 5 eating insects. This makes the garden safe fr flwers t grw.
Once, I put a small frg in my bag by accident. When I checked my 6 later, it jumped ut! My mm wasn’t angry—she said frgs 7 t ur garden’s health.
Scientists d 8 n these creatures. They say climate change may 8 them. It’s sad t think we might lse such helpful friends. Let’s all try t prtect them, s future kids can als feel the 10
f seeing them in the garden.
1．A．playB．takeC．makeD．find
2．A．disappearB．appearC．sleepD．wrk
3．A．addB．useC．tellD．disappint
4．A．as big asB．as small asC．as heavy asD．as lng as
5．A．withB．byC．inD．n
6．A．luggageB．gardenC．hmetwnD．study
7．A．mean a ltB．add a ltC．use a ltD．play a lt
8．A．rlesB．studiesC．climatesD．peas
9．A．helpB．prtectC．disappintD．harm
10．A．sadnessB．happinessC．angerD．kindness
【答案】
1．A 2．B 3．C 4．A 5．B 6．A 7．A 8．B 9．D 10．B
【导语】本文主要讲的是家乡花园里的蘑菇、青蛙等生物对花园有益，气候变化可能伤害它们，我们应保护它们，让未来孩子也能感受看到它们的快乐。
1．句意：许多生物生活在这里，在保持花园美丽方面发挥重要作用。
play扮演；take带走；make制作；find找到。play an imprtant rle in“在……中起重要作用”，固定搭配。故选A。
2．句意：每年夏天，雨后花园里会出现蘑菇。
disappear消失；appear出现；sleep睡觉；wrk工作。根据“Every summer, mushrms…in the garden after rain. They lk like little umbrellas and mean a lt t the sil”可知雨后花园里会出现蘑菇，故选B。
3．句意：孩子们喜欢找蘑菇，但有些是有毒的，所以成年人总是告诉他们不要触摸。
add增加；use使用；tell告诉；disappint使失望。根据“but sme are pisnus, s adults always…them nt t tuch”可知有些蘑菇有毒，所以成年人告诉孩子们不要去触摸，故选C。
4．句意：青蛙也生活在这里。它们不像人的手一样大，但它们是好帮手。
as big as和……一样大；as small as和……一样小；as heavy as和……一样重；as lng as和……一样长。根据“Frgs als live here. They are nt…a human hand, but they are great helpers.”可知此处对比青蛙和“人的手”的大小，强调青蛙虽不大，但作用大，故选A。
5．句意：它们通过吃昆虫来驱赶害虫。
with和……一起；by通过；in 在……里面；n在……上面。by+ding表示“通过……的方式”，根据“They keep pests away…eating insects.”可知此处指的是通过吃昆虫来驱赶害虫，故选B。
6．句意：当我稍后检查我的行李时，它跳了出来!
luggage行李；garden花园；hmetwn家乡；study书房。根据“I put a small frg in my bag by accident.”可知前面说把一只小青蛙放进包里，故此处应是检查“行李”，故选A。
7．句意：我妈妈没有生气——她说青蛙对我们花园的健康很重要。
mean a lt对……意义重大；add a lt添加很多；use a lt使用很多；play a lt玩很多。根据“My mm wasn’t angry—she said frgs…t ur garden’s health.”可知妈妈没有生气，说明青蛙对花园的健康意义重大，故选A。
8．句意：科学家们对这些生物进行研究。
rles角色；studies研究；climates气候；peas豌豆。根据“Scientists d…n these creatures.”可知此处指的是对这些生物进行研究，d studies n“对……进行研究”符合语境，故选B。
9．句意：他们说气候变化可能会伤害它们。
help帮助；prtect保护；disappint使失望；harm伤害。根据“It’s sad t think we might lse such helpful friends.”可知气候的变化可能会伤害它们，故选D。
10．句意：让我们都努力保护它们，这样将来的孩子们也能在花园里感受到看到它们的快乐。
sadness悲伤；happiness快乐；anger愤怒；kindness善良。根据“helpful friends”和“Let’s all try t prtect them, s future kids can als feel the…f seeing them in the garden.”可知此处指的是将来的孩子在花园能感受到看到它们的快乐。故选B。
语篇补全
根据短文内容，从短文后的A~E选项中，选出5个适当的选项补全短文。
Swallws’ Jurney​
Swallws are small birds with lng wings. Every spring, they fly back t ur cities frm warm places like Africa. 1 They build nests under the rfs f huses and n bridges, where they can stay safe.​
Hwever, in recent years, fewer swallws have returned. 2 Many ld huses are being pulled dwn, and new buildings have smth walls—n gd fr building nests. Als, farmers nw use mre chemicals, which kill the insects that swallws eat.​
Luckily, peple are trying t help. 3 In sme twns, wrkers put special wden bxes under bridges t give swallws new nesting places. Schls als teach students abut prtecting these birds.​
Last mnth, a grup f children in a village nticed smething happy: swallws were building nests in the new bxes! 4 “We saw three baby swallws in ne nest,” said 10-year-ld Mia. “It’s like having new friends!”​
Swallws are mre than just birds. 5 By helping them, we learn t care fr all living things arund us.​
A．They bring us jy and remind us f the beauty f nature.​
B．This is because their living envirnment is changing.​
C．They make the jurney t find fd and raise their babies.​
D．The birds sang ludly, and the village felt lively again.​
E．Peple are making their hmes mre swallw-friendly.​
【答案】1．C 2．B 3．E 4．D 5．A
【导语】本文是一篇说明文。主要讲述了燕子的迁徙习性——每年春天从非洲等温暖地区飞回城市筑巢，分析了近年来燕子回归数量减少的原因，介绍了人们为保护燕子所做的努力。
1．根据“Every spring, they fly back t ur cities frm warm places like Africa.”及“They build nests under the rfs f huses and n bridges, where they can stay safe.”可知，前文提到燕子春天迁徙回城市，后文讲燕子筑巢，选项C“它们迁徙是为了寻找食物并养育幼鸟。”解释了燕子迁徙的目的，符合语境，故选C。
2．根据“Hwever, in recent years, fewer swallws have returned.”及“Many ld huses are being pulled dwn... which kill the insects that swallws eat.”可知，前文指出燕子回归数量减少，后文具体说明生存环境的变化，选项B“这是因为它们的生存环境正在发生变化。”作为过渡句，点明数量减少的核心原因，符合语境，故选B。
3．根据“Luckily, peple are trying t help.”及“In sme twns, wrkers put special wden als teach students abut prtecting these birds.”可知，前文提到人们在努力帮助燕子，后文列举具体帮助措施，选项E“人们正在让自己的家园更适合燕子生存。”总述人们改善燕子生存环境的行动，引出下文具体措施，故选E。
4．根据“Last mnth, a grup f children in a village nticed smething happy: swallws were building nests in the new bxes!”及“We saw three baby swallws in ne nest...”可知，前文提到燕子在新巢箱筑巢的喜事，后文引用孩子的话描述看到雏燕的场景，选项D“鸟儿们放声歌唱，村庄又变得热闹起来。”描绘了燕子回归后村庄的生机景象，符合语境，故选D。
5．根据“Swallws are mre than just birds.”及“By helping them, we learn t care fr all living things arund us.”可知，前文强调燕子的特殊意义，后文讲帮助燕子带来的启示，选项A“它们给我们带来欢乐，也提醒我们自然之美。”具体阐述了燕子的价值，符合语境，故选A。
阅读理解
A
In Califrnia, wrkers are building a special bridge t help animals. It is called the Wallis Annenberg Wildlife Crssing. This bridge will help animals walk acrss a big and busy rad safely. The rad is called Highway 101, and it runs thrugh the Santa Mnica Muntains and the Simi Hills. Peple built it a lng time ag, and it makes it hard fr animals t mve arund. The new bridge will make life better fr them.
Peple make wildlife crssings (通道)s animals can walk ver rads withut getting hurt. They als help peple stay safe. When cars hit animals, it can cause crashes (撞车事故). These crashes hurt many peple every year. With this bridge, bth animals and peple will be safer.
On April 2, wrkers started putting a lt f sil n tp f the new bridge. It tk a few weeks t cmplete the wrk. Wrkers will plant many trees and flwers. These plants will help animals feel safe and welcme. The bridge will be very big—it will span (跨过)10 lanes (车道) f Highway 101.
Muntain lins, als called cugars, will use this bridge the mst. They need t travel far t find fd and ther cugars. Many f them die when they try t walk acrss the rad. This bridge will help them stay safe and have mre space t live in. Other animals like rabbits and even butterflies will als use the bridge.
1．What prblem des Highway 101 bring t animals?
A．It makes them lse their hmes.B．It causes them t leave their families.
C．It lets ther big animals find them easily.D．It makes it difficult fr them t mve arund.
2．What des Paragraph 2 mainly want t shw?
A．There are mre and mre cars n the rads nw.
B．Animals n the rads are a big prblem fr peple.
C．Peple cause many prblems fr wildlife every year.
D．Wildlife crssings are gd fr bth peple and animals.
3．What des the underlined wrd “cmplete” in Paragraph 3 mean?
A．Guess.B．Finish.C．Change.D．Fllw.
4．Why did the writer write the text?
A．T tell us smething abut sme animals.
B．T share hw peple built a new rad in Califrnia.
C．T shw the imprtance f a new wildlife crssing.
D．T talk abut the prblems caused by busy rads
【答案】1．D 2．D 3．B 4．C
【导语】本文主要介绍了加州正在建设的Wallis Annenberg野生动物通道，这座横跨101号高速公路的生态桥将帮助山狮等动物安全穿越繁忙道路，既保护了野生动物栖息地连通性，又减少了人车与动物相撞的事故，体现了人与自然和谐共存的理念。
1．细节理解题。根据“The rad…makes it hard fr animals t mve arund”可知，这条公路给动物的迁徙活动造成了困难。故选D。
2．主旨大意题。根据“help animals walk ver rads withut getting hurt”和“help peple stay safe”可知，野生动物通道对人类和动物都有益处。故选D。
3．词句猜测题。根据“wrkers started putting a lt f sil…tk a few weeks t cmplete”可知，此处指“完成”填土工作。故选B。
4．主旨大意题。根据通读全文可知，本文围绕野生动物通道的建设意义展开，强调其对动物和人类安全的双重价值。故选C。
B
What d yu usually d when yu feel stressed (有压力的)? Sme peple chse t d sme exercise. And sme prefer t stay in a rm alne and refuse t talk t anyne. Guess what! Just 15 minutes f playing with a friendly dg can reduce stress.
Research shws that pet dgs can help cllege students feel less stressed. The dgs can als have a great time and feel less stressed after playing with the students!
Yu might want t knw why the researchers chse cllege students fr this research. The Wrld Health Organizatin carried ut research nt lng ag and fund that abut 90% f cllege students experienced stress.
Researchers chse six dgs that were calm in nature and enjyed staying with peple. The dgs were between three and six years ld. It was a busy week befre the exams, and the students were under great stress. Then, the dgs came t help them. The dgs had never taken part in research befre, and the dgs’ wners weren’t there during the playtime. It was just the students and the dgs having a wnderful time tgether.
Befre playing with the dgs, the students were asked t fill ut sme frms abut their stress levels. They als had sme checks n their bdies, including their bld pressure (血压). Then, the students played with the dgs fr 15 minutes. They culd pet the dgs, give them fd r just run arund with them in the playgrund.
The results were amazing. After the students played with the dgs, the dctrs fund that the students felt less stressed. And the dgs’ stress levels stayed lw even a week after the research.
S, if yu’re feeling stressed, perhaps yu shuld play with a dg. It is a gd way t help yu feel better!
1．Hw des the writer start the passage?
A．By ffering sme studies.B．By explaining a feeling.
C．By raising a questin.D．By sharing his experiences.
2．Why did researchers chse cllege students fr the research?
A．Because they all wned dgs at hme.
B．Because mst f them were under stress.
C．Because they had mre free time than thers.
D．Because they were all gd at taking care f animals.
3．What was special abut the dgs in the research?
A．They were calm and human-friendly.
B．All f them were under three years ld.
C．They were trained fr medical purpses.
D．Their wners stayed with them during the research.
4．What is the main finding f the research?
A．Dgs’ stress levels rse after the research.
B．Dgs enjy playing with students mre than with adults.
C．Cllege students are under mre stress than middle schl students.
D．Playing with dgs fr a shrt time can help students feel less stressed.
【答案】1．C 2．B 3．A 4．D
【导语】本文是一篇说明文，文章主要讲述了与友好的狗玩耍15分钟可以减轻压力，并通过研究证明宠物狗可以帮助大学生减轻压力。
1．细节理解题。根据“What d yu usually d when yu feel stressed (有压力的)?”可知，作者以提问的方式开篇。故选C。
2．细节理解题。根据“The Wrld Health Organizatin carried ut research nt lng ag and fund that abut 90% f cllege students experienced stress.”可知，研究人员选择大学生是因为他们普遍承受压力。故选B。
3．细节理解题。根据“Researchers chse six dgs that were calm in nature and enjyed staying with peple.”可知，研究人员选择了六只性格温顺且喜欢与人相处的狗，即这些狗的特点是温顺且亲近人类。故选A。
4．细节理解题。根据“After the students played with the dgs, the dctrs fund that the students felt less stressed.”和全文内容可知，研究的主要发现是短时间与狗玩耍能帮助学生减压。故选D。
任务型阅读理解
Beavers: Nature’s Engineers​
Beavers are amazing animals that live near rivers and lakes. They have strng teeth t cut dwn trees and flat tails t swim. But their mst special skill is building dams—walls made f wd, stnes, and mud. These dams create pnds, which becme hmes fr many ther animals like fish, birds, and frgs.​
Beavers wrk hard t keep their dams strng. They add mre wd r mud when needed, like engineers fixing a bridge. The pnds they build als help plants grw. When rain cmes, the dams slw dwn the water, preventing flds. In dry seasns, the stred water keeps the land green.​
Sadly, beavers are lsing their hmes because peple cut dwn frests and build cities. This makes it hard fr them t find trees t build dams. Withut beavers, many pnds dry up, and ther animals lse their hmes t.​
It’s imprtant fr us t prtect beavers. We can leave sme trees near rivers fr them t use. By ding this, we help keep the ecsystem balanced—just like the beavers d.​
根据短文内容，回答下列问题。​
1．What d beavers use t build dams?
​
2．Hw d the pnds created by beavers help during dry seasns?​
​
3．Why is it hard fr beavers t build dams nw?
​
4．What can we d t prtect beavers?​
​
5．Besides beavers, what ther animal d yu think plays an imprtant rle in nature? Why?
​
【答案】
1．They use wd, stnes, and mud.
2．The stred water keeps the land green.
3．Because peple cut dwn frests and build cities, beavers can’t find enugh trees.
4．We can leave sme trees near rivers fr them t use.
5．I think bees play an imprtant rle. They carry pllen frm flwer t flwer, helping plants reprduce. Withut bees, many fruits and vegetables wuldn’t grw.
【导语】本文介绍了海狸这一被称为 “自然工程师” 的动物，讲述了它们建造水坝的技能、水坝的作用，以及海狸目前面临的生存困境和保护它们的方法。
1．根据第一段中“But their mst special skill is building dams—walls made f wd, stnes, and mud.”可知，海狸用木头、石头和泥土建水坝。故填They use wd, stnes, and mud.
2．根据第二段中“In dry seasns, the stred water keeps the land green.”可知，水坝储存的水在旱季能保持土地呈绿色。故填The stred water keeps the land green.
3．根据第三段中“Sadly, beavers are lsing their hmes because peple cut dwn frests and build cities. This makes it hard fr them t find trees t build dams.”可知，人类砍伐森林和建设城市导致海狸缺少建坝的树木。故填Because peple cut dwn frests and build cities, beavers can’t find enugh trees.
4．根据最后一段“We can leave sme trees near rivers fr them t use.”可知，我们可以在河边留下一些树木供它们使用。故填We can leave sme trees near rivers fr them t use.
5．开放性作答，言之有理即可。参考答案为I think bees play an imprtant rle. They carry pllen frm flwer t flwer, helping plants reprduce. Withut bees, many fruits and vegetables wuldn’t grw.
【主要内容】
【单元核心知识点精讲精练】每个单元按照教材安排分为Sectin A；Grammar和Sectin B三个部分。
Sectin B部分包括本部分重点短语、重点词汇(包括重点的小学词汇)、重难句型等核心知识点。
Sectin B部分包含数量丰富与多类型的随学随练，基础知识综合练习(填写单词，用适当形式填空等)与技能提升综合练习(听力、阅读理解、完形填空，语篇填空等)。
Sectin B部分内容思维导图如下:
*be cnnected with
与...相连；与...有关联
each ther
相互，彼此
ne f the best examples
最好的例子之一
*in fact
确切地说，实际上
80 per cent
百分之八十
*fr this reasn
出于这个原因
ne f the mst interesting animals
最有趣的动物之一
fr example
例如
*in rder t
为了，目的是
use sth. t d ...
用某物做某事
*play a part(in sth.)
参与某事(play an imprtant part in发挥重要作用)
the number f
...的数量
think abut
思考，考虑
n earth
在地球上
such as
例如
*be hme t
有...栖息；是...的家乡
mean a lt t me
对我意义重大
*play a rle (in)
在...发挥作用；扮演角色
the size f ...
...的尺寸/大小
as big as a human hand
和人手一样大
by eating insects
通过吃昆虫(by ding 通过某种方式)
in nature
在自然中
ppular subjects
流行的主题
climate change
气候变化
live up t 90 years
活到90岁
last fr ver a year
持续一年多
A．What happened t them?
B．That’s t bring!
C．Was there anything imprtant?
D．I agree with yu.
E．It’s said that there are few left in the wrld.
F．It’s imprtant t keep the balance (平衡) f nature.
G．Why dn’t they d smething t prtect them?