初二八年级英语下册：主谓一致专项强化练习及答案

这是一份初二八年级英语下册：主谓一致专项强化练习及答案，共17页。
初二英语下册：主谓一致
第一部分:1-50 专项练习 第二部分:51-100全面解析
1．The TV________ on Channel Six are about films.
A．centre B．programmes C．programme D．computer
2．The boy with two dogs _________ in the yard when the earthquake rocked the city.
A．is playing B．was playing C．are playing D．were playing
3．—I'll drink half of the milk. The rest ______ for you, Jane.
—Only for us two? _______ the rest going to be unhappy?
A．is; Are B．are; Is C．is; Is D．are; Are
4．All we need ________ enough money to carry on ________ our work.
A．is; with B．are; with C．is; for D．are; for
5．—Dr. Martin Luther King was killed April 4th, 1968.
—What a pity! Today is April 4th, 2022. I think 54 years a short time, but I still remember him.
A．in; are B．on; aren't C．on; isn't
6．I some banana pies for the party now.
A．make B．makes C．am making
7．—Were you at home at 7：00 last night?
—Yes. I________ the news on TV at that time.
A．watch B．watched C．will watch D．was watching
8．Betty________ hard since last term. That's why her exam results are so good!
A．has worked B．will work C．worked D．was working
9．I can't recognize（认出）her, because she ________a lot over the years.
A．changed B．changes C．will change D．has changed
10．—_________twenty dollars enough for this book?
—I'm afraid not.
A．Was B．Are C．Is D．Were
11．A number of visitors____________ visiting the West Lake and the number of the visitors ____________increasing.
A．are; is B．is; are C．are; are
12．John is from Britain. He_______ English.
A．will speak B．speak C．speaks D．is speaking
13．Everyone_______ except Jack. He is going over his lessons in the sitting room.
A．are sleeping B．is sleeping C．sleeping D．sleep
14．Nancy, as well as her parents, often ____ shopping on Sunday afternoon.
A．go B．goes C．went D．are going
15．He says that if it _______ tomorrow, he _____fishing.
A．will rain, won't go B．rained, wasn't go
C．rains, won't go D．rain, will go
16．There________ too much rubbish in the park.
A．are B．is C．has D．have
17．________ of the students in our class ________ going to the summer camp in Beijing next week.
A．Two fifths; is B．Second fifths; are
C．Second fifths; is D．Two fifths; are
18．Watching TV too much ________ bad for your eyes.
A．am B．are C．is D．be
19．—What do you think of the movie FangHua?
—It's moving and it ________ my grandma ________ the life in the countryside.
A．reminds; of B．lets; down C．wakes; up D．thinks; of
20．In our school library there are a number of books on science, and these years the number of them ______________growing larger and larger.
A．has B．have C．are D．is
21．—Your small bag is full. What have you got in it?
—Well. There _____ a pen and two books.
A．is B．are C．was D．were
22．Lucy as well as her sisters ___________invited to the party. There ___________one boy and seven girls at the party.
A．were; was B．were; were C．was; was D．was; were
23．—Most of the computer software in our company ___________bought in this factory every year.
—And will you continue ___________the software from it?
A．are; to buy B．are; bought C．is; to buy D．is; bought
24．We need to learn knowledge in our lives. And knowledge from questioning.
A．much; come B．much; comes C．many; come D．many; comes
25．—I called you last night, but there was no answer.
—Oh, sorry.I dinner with my friends.
A．was having B．were having C．has had D．had
26．—Susan wants to know if you ________a picnic next Saturday.
—Yes. But if it ________, we'll visit the museum instead.
A．will have; will rain B．have; rains
C．have; will rain D．will have; rains
27．She says she as well as her parents ________ Shanghai since Jan.2020.
A．have been in B．have gone to C．has gone to D．has been in
28．When the teacher asks him, he always ____.
A．keep silent B．keep silently C．keeps silent D．keeps silenty
29．— When will Wuxi Metro Line 4 open?
— _______ next year. Only 10% of it ______ been built.
A．Until; has B．Until; have
C．Not until; has D．Not until; have
30．Mr Smith together with his two sons __________ Shanghai for about five months.
A．has left B．have left
C．has been away from D．have been away from
31．Most business letters around the world in English.
A．writes B．is written C．wrote D．are written
32．Lots of children's lives ______ because of Project Hope in China.
A．were changed B．changed C．changing D．was changed
33．All we want to do ______ to find enough water _______the horses.
A．are, to B．is, for C．be, as D．is, to give
34．The number of the students in our school __________more than three _______.
A．is; thousand B．is; thousands C．are; thousand D．are; thousands
35．Twenty miles away from home ______ a long distance.
A．be B．are C．were D．is
36．A library with five thousand books ______ to the nation as a gift.
A．is offered B．has offered C．are offered D．have offered
37．Not only Mike but also Jim ______ lots of time ______.
A．spends; on reading B．spend; reading
C．spends; reading D．spends; to read
38．—I'd like you to tell me something about Zhangjiajie.
—I'm sorry. Neither Jack nor I there.
A．have been B．has been C．have gone D．has gone
39．—I hear ________ your grandpa _________ your grandma enjoy watching Beijing opera.
—Right, just as many old people do.
A．both; and B．neither; nor
C．either; or D．not only; but also
40．—How long the film KING KONG ?
—For just several minutes.
A．did; begin B．has; end
C．have; been on D．has; been over
41．President Xi Jinping along with his wife Peng Liyuan _____ to Beijing from _____ visits to the four foreign countries.
A．has returned; their B．has returned; his
C．have returned; his D．have returned; their
42．Cutting down too many trees _______ it _______ for people to protect wildlife in the world.
A．make, impossible B．makes; possible
C．make; possible D．makes; impossible
43．My uncle's family is very poor, so he ____ work hard to make more money.
A．need to B．needs C．needs to D．needed to
44．If you ____________the room, please turn off the light.
A．left B．are leaving C．leave
45．—I'm sorry that John is out.
—Please ask him to call me as soon as he _______________.
A．return B．returns C．returned D．returning
46．When the teacher asks him, he always ____.
A．keep silent B．keep silently C．keeps silent D．keeps silently
47．Here ____ for helping Mary.
A．is an advice B．is some advice
C．are some advices D．is some suggestion
48．My mom always _____ at six in the morning.
A．woke up me B．woke me up C．wakes up me D．wakes me up
49．There _____ no need for him to buy those books.
A．be B．am C．is D．are
50．— What do you think of the environment here, Mr. Wang?
—Wonderful! of the land covered with trees and grass.
A．Two fifths; is B．Two fifth; is
C．Two fifths; are D．Two fifth; are


答案解析部分
1．B
2．B
3．A
4．A
5．C
6．C
7．D
8．A
9．D
10．C
11．A
12．C
13．B
14．B
15．C
16．B
17．D
18．C
19．A
20．D
21．A
22．C
23．C
24．B
25．A
26．D
27．D
28．C
29．C
30．C
31．D
32．A
33．B
34．A
35．D
36．A
37．C
38．A
39．A
40．D
41．B
42．D
43．C
44．C
45．B
46．C
47．B
48．D
49．C
50．A


初二英语下册：主谓一致
第一部分:1-50 专项练习 第二部分:51-100全面解析


1．The TV________ on Channel Six are about films.
A．centre B．programmes C．programme D．computer
全面分析：电视频道6是电影相关的节目。centre中心；programmes节目（复数）；programme节目；computer电脑。根据are和The TV可知，此处是电视节目，且应用名词复数做主语。故选B。

2．The boy with two dogs _________ in the yard when the earthquake rocked the city.
A．is playing B．was playing C．are playing D．were playing
全面分析：地震发生时，这个男孩和两条狗正在院子里玩。根据时间状语从句" when the earthquake rocked the city"可知，表示地震发生时是过去时，主句的动作正在进行，故从句用过去进行时，was/were doing的形式；with连接两个名词作主语时，遵循"就远原则"，谓语动词由The boy决定，故主语是第三人称单数，故be动词用was，故选B。

3．—I'll drink half of the milk. The rest ______ for you, Jane.
—Only for us two? _______ the rest going to be unhappy?
A．is; Are B．are; Is C．is; Is D．are; Are
全面分析：——我要喝一半的牛奶。剩下的是给你的，简。——只有我们两个？其他人会不高兴吗?is单数；are复数；第一个空，The rest"剩下的"，指的milk"牛奶"，不可数名词，用is。第二个空，the rest指其他人，复数，用Are。故答案为A。

4．All we need ________ enough money to carry on ________ our work.
A．is; with B．are; with C．is; for D．are; for
全面分析：我们所需要的只是足够的钱来继续我们的工作。句子的主语是all，不定代词，指代后面的money，不可数名词，所以谓语的be动词用单数is；carry on with固定搭配，继续坚持做某事，故答案为A。

5．—Dr. Martin Luther King was killed April 4th, 1968.
—What a pity! Today is April 4th, 2022. I think 54 years a short time, but I still remember him.
A．in; are B．on; aren't C．on; isn't
全面分析：——马丁·路德·金博士于1968年4月4日遇刺身亡。——真遗憾！今天是2022年4月4日。我认为54年不是一段短时间，但我仍然记得他。具体的某一天前用介词on，第一空根据可知是具体的某一天，用on；表示时间，金钱，距离和重量等的名词看作一个整体，做主语时，谓语动词用单数，第二个空是54 years时间，做主语，用单数的isn't，故答案为C。

6．I some banana pies for the party now.
A．make B．makes C．am making
全面分析：我现在为聚会做一些香蕉派。根据now，可知是现在进行时，表示此时此刻正在进行的动作，故谓语动词是be doing的形式，主语是I，助动词是am，故选C。

7．—Were you at home at 7：00 last night?
—Yes. I________ the news on TV at that time.
A．watch B．watched C．will watch D．was watching
全面分析：——昨晚7点你在家吗？——对。当时我正在看电视新闻。A.观看，一般现在时；B.观看，一般过去时；C.将观看，一般将来时；D.正在观看，过去进行时。根据时间状语at 7：00 last night可知表明过去某一时刻正在进行的动作，用过去进行时，结构是was/were+动词ing，主语是I，所以be用was，watch用watching，故选D。

8．Betty________ hard since last term. That's why her exam results are so good!
A．has worked B．will work C．worked D．was working
全面分析：两周前我就没收到黛西的信了。根据时间状语since two weeks ago自从两周前，可知句子时态为现在完成时have/has+过去分词，主语I为第一人称单数，助动词应用have，否定形式为haven't；动词hear的过去分词为heard。故答案为： haven't heard 。

9．I can't recognize（认出）her, because she ________a lot over the years.
A．changed B．changes C．will change D．has changed
全面分析：我不能认出她了，因为这么多年她已经改变了很多。A.改变了，一般过去时；B.改变，一般现在时的三单形式；C.将改变，一般将来时；D.已经改变，现在完成时。根据时间状语over the years这么多年，可知这里指的是过去的动作对现在的影响，应用现在完成时态have+过去分词。故选D。

10．—_________twenty dollars enough for this book?
—I'm afraid not.
A．Was B．Are C．Is D．Were
全面分析：——这本书20美元足够吗？——我恐怕不够。时态是一般现在时，所以排除一般过去时的was和were，排除A、D。表示“时间、重量、长度、价值”等的名词的复数作主语时，谓语动词通常用单数形式，这是由于作主语的名词在概念上是一个整体。时态上根据语境，应该是一般现在时。所以用be动词is，故选C。

11．A number of visitors____________ visiting the West Lake and the number of the visitors ____________increasing.
A．are; is B．is; are C．are; are
全面分析：一些旅游者正在参观西湖，游客的数量正在增长。a number of，意为“一些”，后跟可数名词复数做主语，谓语系动词用are；the number of 意为“……的数量”，后跟可数名词复数做主语，谓语系动词用is。故选A。

12．John is from Britain. He_______ English.
A．will speak B．speak C．speaks D．is speaking
全面分析：约翰来自英国。他说英语。此处缺少谓语动词，描述客观事实是一般现在时，主语是第三人称单数，故谓语动词是单三式，故选C。

13．Everyone_______ except Jack. He is going over his lessons in the sitting room.
A．are sleeping B．is sleeping C．sleeping D．sleep
全面分析：除了杰克，每个人都在睡觉，他正在客厅复习功课。根据He is going over，可知是时态现在进行时，主语是第三人称单数，故be是is，故选B。

14．Nancy, as well as her parents, often ____ shopping on Sunday afternoon.
A．go B．goes C．went D．are going
全面分析： 南希和她的父母经常在星期天下午购物。go shopping，购物，固定结构。as well as 也，还。在连接两个主语时，其后面的主语只能作伴随主语。本句的真正主语为 Nancy，故谓语动词用第三人称单数形式。故选B。

15．He says that if it _______ tomorrow, he _____fishing.
A．will rain, won't go B．rained, wasn't go
C．rains, won't go D．rain, will go
全面分析：他说如果明天下雨的话，他将不去钓鱼。分析题干可知此句是if引导的条件状语从句，主句要用将来时，从句为一般现在时。选项A与B被排除。it单数第三人称，动词rain后应加s。选项D被排除，故选C。

16．There________ too much rubbish in the park.
A．are B．is C．has D．have
全面分析：公园里有太多的垃圾。根据句子结构可知是there be结构，表示“某处有某物”。句子的主语too much rubbish不可数，用is，故答案为B。

17．________ of the students in our class ________ going to the summer camp in Beijing next week.
A．Two fifths; is B．Second fifths; are
C．Second fifths; is D．Two fifths; are
全面分析：我们班五分之二的学生下周要在北京参加夏令营。分数的表达方式：分子用基数词，分母用序数词，分子超过一，分母用序数词；分数修饰名词复数做主语时谓语动词用复数，故选D。

18．Watching TV too much ________ bad for your eyes.
A．am B．are C．is D．be
全面分析：看电视太多对你的眼睛有害。主语是动名词短语Watching TV too much，谓语动词用单数，故选C。

19．—What do you think of the movie FangHua?
—It's moving and it ________ my grandma ________ the life in the countryside.
A．reminds; of B．lets; down C．wakes; up D．thinks; of
全面分析：—— 你觉得电影《芳华》怎么样？——它很感人，让我奶奶想起了农村的生活。remind of想起，提醒；let down下降； wakes up唤醒；think of认为。根据the life in the countryside可知，电影让奶奶想起了农村的生活。故选A。

20．In our school library there are a number of books on science, and these years the number of them ______________growing larger and larger.
A．has B．have C．are D．is
全面分析：在我们学校的图书馆有很多关于科学的书。并且这些年书的数量越来越多。the number of+名词复数作主语，谓语动词用第三人称单数，根据growing larger and larger可知句子时态是现在进行时，现在进行时的结构is/am/are+doing，故选D。

21．—Your small bag is full. What have you got in it?
—Well. There _____ a pen and two books.
A．is B．are C．was D．were
全面分析：—— 你的小包已经满了。里面有什么? ——有一只钢笔和两本书。根据问句为一般现在时可知，此处询问目前的状态，回答也用一般现在时，排除C和D；there be句型中，be动词根据就近原则可知，此处应该与名词单数pen保持一致，所以系动词应该用单数is，故选A。

22．Lucy as well as her sisters ___________invited to the party. There ___________one boy and seven girls at the party.
A．were; was B．were; were C．was; was D．was; were
全面分析：露西和她的姐妹们被邀请参加聚会。聚会上有一个男孩和七个女孩。主语是Lucy，因此第一个空选was；There be结构有“就近原则”，因此第二个空选was，故选C。

23．—Most of the computer software in our company ___________bought in this factory every year.
—And will you continue ___________the software from it?
A．are; to buy B．are; bought C．is; to buy D．is; bought
全面分析：——我们公司的大部分电脑软件每年都是在这个工厂购买的。——你会继续从它那里购买软件吗？句子的主语是most of the computer software为不可数名词，谓语用单数，排除AB选项；根据continue to do 继续做某事，固定搭配可知第二个空用动词不定式，故答案为C。

24．We need to learn knowledge in our lives. And knowledge from questioning.
A．much; come B．much; comes C．many; come D．many; comes
全面分析：在我们的生活中，我们需要学习很多知识。而知识来自于质疑。knowledge，知识，不可数名词，所以用much修饰，句子表示的是客观真理，所以用一般现在时，主语knowledge是单数，所以谓语动词用其第三人称单数形式comes，故选B。

25．—I called you last night, but there was no answer.
—Oh, sorry.I dinner with my friends.
A．was having B．were having C．has had D．had
全面分析：——昨晚我给你打电话，但没有人接。——噢，对不起，我正在和朋友们一起吃晚饭。”A过去进行时态，B过去进行时态，C现在完成时，D一般过去时态。结合语境”昨晚我给你打电话，但没有人接”，可知表示过去某个时间正在进行的动作，用过去进行时态，主语是I第一人称，因此用was，故选A。

26．—Susan wants to know if you ________a picnic next Saturday.
—Yes. But if it ________, we'll visit the museum instead.
A．will have; will rain B．have; rains
C．have; will rain D．will have; rains
全面分析：——苏珊想知道你下周六是否吃野餐。——吃，但是如果下雨，我们们将去参观博物馆。第一个空是宾语从句，next Saturday是一般将来时标志，故动词是will do的形式，第二个空是if引导的条件状语从句，从句是时态是一般现在时，主语是第三人称单数故谓语动词是单三式，故选D。

27．She says she as well as her parents ________ Shanghai since Jan.2020.
A．have been in B．have gone to C．has gone to D．has been in
全面分析： 她说她和她的父母从2020年1月起就在上海了。根据 since Jan. 2020 可知，动词表示持续状态，have been in是持续动词，have gone to是瞬间动词，as well as有就前一致原则，故主语是she，故助动词是has，故选D。

28．When the teacher asks him, he always ____.
A．keep silent B．keep silently C．keeps silent D．keeps silenty
全面分析：当老师询问他时，他一直保持沉默。keep+形容词为固定搭配，意思是“保持某种状态”，silent为形容词，意思是“安静的”；句中主语he为第三人称单数，故keep要用三单形式，故选C。

29．— When will Wuxi Metro Line 4 open?
— _______ next year. Only 10% of it ______ been built.
A．Until; has B．Until; have
C．Not until; has D．Not until; have
全面分析：—— 无锡地铁4号线什么时候开通? ——直到明年才能开通，只建造了百分之十。until直到；not…until…，直到……才……；第一空根据问句 When will Wuxi Metro Line 4 open? 可知，指的是要到明年才能开通，用not until；第二空根据句子结构可知，是现在完成时，用have/has done形式；主语是百分数形式修饰的词，谓语动词应该跟it保持一致，所以用has，故选C。

30．Mr Smith together with his two sons __________ Shanghai for about five months.
A．has left B．have left
C．has been away from D．have been away from
全面分析：史密斯先生和他的两个儿子离开上海大约五个月了。主语是with结构时谓语动词的形式根据with前面的名词或者代词确定，with前面的名词是单数Smith，所以用has，排除B、D。for+时间段用现在完成时，并且用延续性动词，left是leave的过去分词，非延续性动词，延续性动词是be away from，be的过去分词是been，故选C。

31．Most business letters around the world in English.
A．writes B．is written C．wrote D．are written
全面分析： 世界上大多数商业信件都是用英语写的。 write写，动词；根据句意可知，此处 letters是write的动作承受者，所以需要被动语态，用be done形式；此处叙述客观事实，用一般现在时，主语为名词复数，所以谓语动词用复数are，故选D。

32．Lots of children's lives ______ because of Project Hope in China.
A．were changed B．changed C．changing D．was changed
全面分析： 由于中国的希望工程，许多儿童的生活都被改变了。change改变，根据 because of Project Hope in China. 可知，此处children's lives 是change的动作承受者，所以应该用被动语态，主语为名词复数，所以系动词用复数were，故选A。

33．All we want to do ______ to find enough water _______the horses.
A．are, to B．is, for C．be, as D．is, to give
全面分析： 我们所要做的就是为马找到足够的水。 分析句子结构可知，此处是主语从句，后面的系动词应该用单数is；to向，朝；for为；as作为；to give给；根据句意可知，此处是find sth. for sb.为某人找到某物，固定短语，故选B。

34．The number of the students in our school __________more than three _______.
A．is; thousand B．is; thousands C．are; thousand D．are; thousands
全面分析：在我们学校学生的数量超过三千。句子的主语是the number，谓语动词要用单三；thousand用在具体数字后表示几千，要用单数形式，故选A。

35．Twenty miles away from home ______ a long distance.
A．be B．are C．were D．is
全面分析：离家二十英里是一段很长的距离。金钱，距离，时间等作主语时，谓语动词用单数，故答案为D。

36．A library with five thousand books ______ to the nation as a gift.
A．is offered B．has offered C．are offered D．have offered
全面分析：一个具有五千本书的图书馆作为一个礼物被提供给这个国家。主语为A library，with five thousand books作介词短语，不能算作主语，谓语动词用is。这里句子主语是动作承受者，用被动语态（be+动词的过去分词），故答案为A。

37．Not only Mike but also Jim ______ lots of time ______.
A．spends; on reading B．spend; reading
C．spends; reading D．spends; to read
全面分析：不仅是迈克还有吉姆也花费很多时间阅读。spend花费，实义动词；read读书，实义动词。not only...but also...连接两个主语时，谓语动词与后者保持一致，即Jim是单数，所以用spends。spend+时间+ (in) doing sth.做某事花费某人多长时间，固定搭配，所以用reading，故答案选C。

38．—I'd like you to tell me something about Zhangjiajie.
—I'm sorry. Neither Jack nor I there.
A．have been B．has been C．have gone D．has gone
全面分析：——我想让你告诉我一些关于张家界的事情。——对不起。杰克和我都没去过那里。根据题干中的I'm sorry可知此句表示我没有去过那里。曾经去过某地要用have been而不用have gone。neither…nor表示既不……也不……连接两个相同的句子成分，连接主语时谓语动词要用nor后面的主语决定其形式。题干中nor后面的主语是I，助动词要用have，故选A。

39．—I hear ________ your grandpa _________ your grandma enjoy watching Beijing opera.
—Right, just as many old people do.
A．both; and B．neither; nor
C．either; or D．not only; but also
全面分析：——我听说你爷爷和你奶奶都喜欢看京剧。——对的，就像许多老人一样。A、两者都；B、既不……也不；C、要么……要么；D、不仅……而且。由下文Right, just as many old people do.可知上文要说的是“两者都喜欢看京剧”，排除B；either…or，not only…but also连接两个并列名词作主语时，要遵循就近原则，即谓语动词要和靠近它的主语保持一致；这是一个宾语从句，再由enjoy watching Beijing opera中的enjoy，可知从句的主语也要是复数，故选A。

40．—How long the film KING KONG ?
—For just several minutes.
A．did; begin B．has; end
C．have; been on D．has; been over
全面分析：—— 电影《金刚》多长时间结束？—— 就几分钟。 how long多长时间，就时间段提问，后面的动词应该用延续性动词，begin开始和end结束都是非延续性动词，故排除A和B；be on上映；be over结束；此处主语是电影名，为专有名词，所以现在完成时应该用has done形式；故选D。

41．President Xi Jinping along with his wife Peng Liyuan _____ to Beijing from _____ visits to the four foreign countries.
A．has returned; their B．has returned; his
C．have returned; his D．have returned; their
全面分析：习近平主席和他的妻子彭丽媛已经结束了对四个国家的访问回到了北京。此句用现在完成时，表示已经完成的动作，结构为“have/has done”；主语 President Xi Jinping是单数，助动词用has，第二空用物主代词his，表示“他的”访问。故选B。

42．Cutting down too many trees _______ it _______ for people to protect wildlife in the world.
A．make, impossible B．makes; possible
C．make; possible D．makes; impossible
全面分析： 句意：砍伐太多的树木使得人们不可能保护世界上的野生动物。此句是客观真理，用一般现在时；主语 Cutting down too many trees 是动名词短语，谓语动词用三单形式makes；possible可能的，impossible不可能的，此处意思是“不可能的”，故选D。

43．My uncle's family is very poor, so he ____ work hard to make more money.
A．need to B．needs C．needs to D．needed to
全面分析：我叔叔家很穷，所以他需要努力工作来赚更多的钱。need to do sth.，需要做某事，固定搭配，主语是he，所以need要用其第三人称单数needs，故选C。

44．If you ____________the room, please turn off the light.
A．left B．are leaving C．leave
全面分析：如果你离开房间，请关灯。 if引导的条件状语从句，主句用祈使句，从句用一般现在时，you作主语，故谓语动词用动词原形。故选C。

45．—I'm sorry that John is out.
—Please ask him to call me as soon as he _______________.
A．return B．returns C．returned D．returning
全面分析：——约翰出去了，我很抱歉。——请他一回来就给我打电话。此句是as soon as引导的时间状语从句，用一般现在时表将来，且主语he是第三人称单数，所以此处用returns。故选B。

46．When the teacher asks him, he always ____.
A．keep silent B．keep silently C．keeps silent D．keeps silently
全面分析： 当老师问他时，他总是保持沉默。keep保持，连系动词，后面要跟跟形容词作表语； silently 默默地，副词； silent沉默的，形容词；排除B和D；根据句中always可知，此处描述经常性动作，所以用一般现在时，主语为第三人称单数，所以谓语动词用三单形式，故选C。

47．Here ____ for helping Mary.
A．is an advice B．is some advice
C．are some advices D．is some suggestion
全面分析：这里是一些帮助玛丽的建议。advice建议，不可数名词；suggestion建议，可数名词；some一些，修饰不可数名词或者可数名词复数；A项中an应该修饰可数名词单数，故排除；C项中advice为不可数名词，没有名词复数，故排除；D项suggestion为可数名词，需要复数形式，故排除；根据句意和句子结构可知，此处是here be结构，be动词根据就近原则，故选B。

48．My mom always _____ at six in the morning.
A．woke up me B．woke me up C．wakes up me D．wakes me up
全面分析： 我妈妈总是在早上六点钟叫醒我。always是一般现在时标志，主语是mom，第三人称单数，故谓语动词是单三式，woke是过去式，故排除A和B选项，宾格me位于动词和副词up之间，故选D。

49．There _____ no need for him to buy those books.
A．be B．am C．is D．are
全面分析：他没必要买那些书。There is no need for sb to do sth.没有必要做某事，固定句型。故选C。

50．— What do you think of the environment here, Mr. Wang?
—Wonderful! of the land covered with trees and grass.
A．Two fifths; is B．Two fifth; is
C．Two fifths; are D．Two fifth; are
全面分析：——你认为这里的环境怎么样，王先生？——好极了！这个岛的五分之二被树和草覆盖着。分数表达方式，分子超过一，分母用复数，五分之二two fifths，第三人称单数作主语，be动词用is，故选A。