2020-2021学年Lesson 1 To Clone or Not to Clone?课堂教学ppt课件

这是一份2020-2021学年Lesson 1 To Clone or Not to Clone?课堂教学ppt课件，共60页。PPT课件主要包含了课前自主预习，课文语篇研读，匹配段落大意，课堂新知讲练，◇词汇拓讲，◇句式解读，突 破 语 法，□观察领悟，□完成时，□追踪练习等内容，欢迎下载使用。

Ⅰ．猜词意　A．比较　B．永远，长久地　C．障碍；壁垒；屏障　D．人为地；人工地；虚假地　E．强烈的情感；激情
1．A severe strm destryed a natural barrier between the huse and the lake. (　　)2．Laughter is ne f the mst infectius expressins f emtin. (　　)3．Why d scientists need artificially intelligent cmputer assistance？(　　)【答案】1．C　2．E　3．D　
4．When yu make a cmparisn, yu cnsider tw r mre things and discver the differences between them. (　　)5．If yu say that smething will happen r cntinue frever, yu mean that it will always happen r cntinue. (　　)【答案】4．A　5．B　
Ⅱ．猜单词拼写　1．mere adj. 仅仅；只不过；极少的→________adv. 仅仅，只　2．artificial adj. 人造的，人工的；人为的→________　adv. 人为地；虚假地　3．whle adj. 全部的；整体的→________　adv. 完全地　【答案】1．merely　2．artificially　3．whlly　
4．accurate adj. 准确的；正确的→________adv. 精确地，准确地　(参考：identical→identically)　5．cmpare v. 比较；对比→________ n. 比较　(参考：divide→divisin)　6．treat v. 对待，看待；治疗，医治；请客，招待→________ n. 诊疗；治疗；疗法，对待方式　(参考：achieve→achievement)　【答案】4．accurately　5．cmparisn　6．treatment　
Ⅲ．完成句子　1．Clning is the prcess f making an exact cpy f a plant r animal and develping it ________.克隆是通过自然或人为的方式，对植物或动物进行精确复制、培育的过程。【答案】1．either naturally r artificially　
2．In January 2018, the clning f tw lng-tailed mnkeys, Zhng Zhng and Hua Hua, ________ by Chinese scientists.2018年1月，中国科学家宣布成功克隆两只长尾猴，中中和华华。【答案】2．was annunced　
3．The successful clning f primates has ________ wrldwide praise as a huge breakthrugh that might lead t cures fr varius diseases and may als ffer clues n ________ the aging prcess.灵长类动物的成功克隆获得了全世界的赞誉，被认为是一项巨大的突破，从而为治愈多种疾病、延缓衰老提供线索。【答案】3．led t; hw t prevent　
4．Fr years, there had been ________ animals artificially.多年来，人们一直在尝试人工克隆动物。5．At first, Dlly grew nrmally, but later she ________ that is mre nrmally fund in much lder animals.起初，多莉发育正常，但后来患上了一种疾病，这种疾病更常见于衰老的动物。【答案】4．attempts t clne　5．develped an illness　
Ⅳ．预备语法(The Perfect Tense)　认真阅读下面各句，注意黑体部分，并完成下面内容　①Why haven’t yu been in tuch?　②What have yu been ding during the hlidays?　③I expect yu have been wrking hard fr yur exams!　④At least by the time I get back I will have read that awfully bring bk…　
⑤Anyway, having walked all the way t the tp, we were tired and stpped…　⑥Well, he had been standing there fr a minute r s when there was a nise.⑦It must have been an instinctive reactin but it saved my life.⑧The by pretended t have knwn it.
1．以上句子分别使用了不同的________或________形式来表达“完成”的概念。2．根据以上例句，表示“完成”动作的形式有：________时态(句①), ______时态(句②和句③)，过去完成进行时态(句⑥), ______时态(句④), ______的完成式(句⑧)，动词-ing形式的完成式(句⑤)，含有情态动词的完成时态(句⑦)。【答案】1．时态；非谓语动词　2．现在完成；现在完成进行；将来完成；不定式　
Ⅰ．阅读理解　(　　)1．Which f the fllwing examples belngs t natural clning?　A．Identical twins.B．Clning a sheep.C．Clning a lng-tailed mnkey.D．Clning a dg.【答案】A
(　　)2．What was the first successfully clned animals?　A．Tw lng-tailed mnkeys.B．A sheep named Dlly.C．A camel called Zhng Zhng.D．A gat named Hua Hua.【答案】B
(　　)3．Which f the fllwing is NOT the ptential benefits f clning primates accrding t passage?　A．It can result in cures fr varius diseases.B．It can ffer clues n hw t prevent the aging prcess.C．We can have the ptential t raise a number f mnkeys with identical genes in a shrt amunt f time.D．It can help increase research time and prvide mre accurate results.【答案】D
(　　)4．Fr hw lng did Dr. Sun Qiang’s team wrk?　A．Almst 100 days.B．Abut 24 mnths.C．Mre than 5 years.D．Abut seven weeks.【答案】C
(　　)5．What is the writer’s attitude twards clning?　A．Dubtful. B．Oppsed.C．Critical. D．Objective.【答案】D　
Ⅱ．判断正误　(　　)1．Clning is the prcess f making an exact cpy f an animal r a plant and develping it either artificially r naturally.(　　)2．In 1986 a sheep named Dlly was successfully clned.(　　)3．The sheep Dlly lived fr six and a half years, nly ne-third the life f the sheep frm which she was clned.【答案】1－3　TFF　
(　　)4．It was Chinese scientists wh annunced the clning f tw lng-tailed mnkeys in January, 2018．　(　　)5．Dr. Sun Qiang’s team succeeded in clning a mnkey with ease.(　　)6．We are sure f what will happen t Zhng Zhng and Hua Hua.【答案】4－6　TFF　
【答案】Para. 1：B　Para. 2：A　Para. 3：E　Para. 4：F　Para. 5：D　Para. 6：C　
Ⅳ．课文语法填空　Clning ccurs when an egg splits and creates identical twins. The first animals t be 1. ________(successful) clned by scientists was a sheep called Dlly. Despite the initial success, she suffered frm an illness and died at 2. ________ age f six. Since then, ther animals have been clned but have als experienced similar health prblems.【答案】1．successfully　2．the　
In 3. ________(cmpare) with ther species, attempts t clne mnkeys have been far mre cmplicated and tk Chinese scientists many years. The reasn they wanted t break this technical barrier was 4. ________ mnkey clning might ffer clues as t hw 5. ________(cure) illness and disease. As the technlgy imprves and becmes mre accurate there wuld be even 6. _____(great) benefits.【答案】3．cmparisn　4．that　5．t cure　6．greater　
Althugh sme peple view clning as crucial fr medical and scientific 7. ________(develp), thers wrry that this technlgy will lead 8. ________ clning f ther species. There is a risk that this culd 9. ________(abuse) by sme cmpanies r peple.Whether it is a blessing 10. ________ a curse fr humanity depends n hw we chse t use it.【答案】7．develpment　8．t　9．be abused　10．r　
1．lead t导致　(P52)This has led t questins such as…　【翻译】这就导致了诸如……的问题。
【语言提升】　lead vi. &vt. 导致；通向；引导；过(某种生活)　lead sb. t d sth. 引导某人做某事　lead a…life过着……生活　leader n. 领导　leading adj. 主要的；领导的　
Excuse me, des this rad lead t the railway statin?　请问，这条路通向火车站吗？　T lead a happy life is the villagers’ hpe.过上幸福生活是村里人的祈盼。Ding what yu lve may lead yu t find a way t make mney.做你喜欢的事可能会让你找到赚钱的方法。
【温馨提示】　表示“导致”的短语还有：result in, bring abut。
【针对练习】　单句语法填空　(1)Lack f exercise can lead ________ feelings f depressin and exhaustin.(2)T lead ________ regular life is beneficial t gd health.(3)Our guide led us ________(pass) thrugh the thick frest.(4)The new evidence led t him _______(arrest) by the plice.【答案】(1)t　(2)a　(3)t pass　(4)being arrested　
完成句子　(5)He still believed that hnesty and hard wrk wuld ___________ success.他仍然相信诚实加勤奋就能通向成功。【答案】(5)lead t　
2．cmparisn n. 比较　(P52)In cmparisn with ther species, clning primates has prved t be “much harder”…　【翻译】与其他物种相比，克隆灵长类动物已证明“更难”……　
【语言提升】　in/by cmparisn with… 和……相比　In cmparisn with last year, the price f beef has increased.与去年相比，牛肉的价格上涨了。
cmpare vt. 比较；将……比作　cmpare…with… 把……和……相比　Managers analyse their cmpany’s data and cmpare it with the data n their cmpetitrs.经理们分析他们公司的数据并与其竞争者的数据进行比较。
cmpare…t… 把……和……相比；把……比作……　We ften cmpare the children t the flwers f the cuntry.我们常把孩子比作祖国的花朵。cmpared with/t… 和……相比　Our greenhuse is nthing cmpared with yurs.我们这个温室比起你们那个简直是小巫见大巫。
cmpare ntes (with sb. ) (与某人)交换意见　Mther and Mrs Barker like t cmpare ntes abut cking.母亲和巴科太太喜欢就烹调交换意见。
【针对练习】　单句语法填空　(1)The telecm industry in Australia is very small ________ cmparisn with the rest f the wrld.(2)It is difficult t make a ________(cmpare) with her previus bk—they are cmpletely different.(3)My wn prblems seem small ________(cmpare) with ther peple’s.【答案】(1)in/by　(2)cmparisn　(3)cmpared　
完成句子　(4)These tw scientists ften ________________ each ther n their research prjects.这两位科学家在研究工作方面常常交换意见。(5)Yung peple are ften ________________ the rising sun.年轻人常被比作初升的太阳。【答案】(4)cmpare ntes with　(5)cmpared t　
3．attempt n. &vi. 尝试；试图　(P52)Fr years, there had been attempts t clne animals artificially.【翻译】多年来，人们一直试图人工克隆动物。
【语言提升】　make an attempt t d sth. /at ding sth. 尝试/试图做某事　She made an attempt t vercme her weaknesses.她努力克服自己的缺点。at the first attempt 第一次尝试　He finished the game successfully at the first attempt.他第一次尝试就成功地完成了比赛。
attempt t d sth. 尝试/试图做某事　He had attempted t rescue the drwning man.他曾试图去救那个溺水的男人。attempted adj. 蓄意的；未遂的　attempted murder/escape谋杀/逃跑未遂　She was sentenced t twenty years’ imprisnment fr pisning and attempted murder.她因投毒和谋杀未遂而被判处了20年监禁。
【语境助记】　He made an attempt t practice and attempted t pass the driving test at the first attempt.他努力训练，试图在第一次尝试时就通过驾驶考试。
【针对练习】　单句语法填空　(1)She was prud as a peacck when she passed her driving test ________ the first attempt.(2)They are attempting ________(climb) the steepest part f Munt Tai.(3)She has been charged with the ________(attempt) murder f her husband.【答案】(1)at　(2)t climb　(3)attempted　
一句多译　(4)我认为你应该尽力抓住这个机会来更进一步学习中国的传统文化。I think that yu shuld ________ ________ ________ this pprtunity t learn traditinal Chinese culture further. (attempt vt. )　【答案】(4)attempt t grasp
＝I think that yu shuld ________ ________ ________ ________ ________ this pprtunity t learn traditinal Chinese culture further. (attempt n. )　＝I think that yu shuld ________ ________ ________ ________ ________ this pprtunity t learn traditinal Chinese culture further. (attempt n. )　【答案】make an attempt t grasp; make an attempt at grasping　
4．cncern n. 关心；担心　vt. 使担心；涉及，关系到　(P53)While sme peple believe it is crucial fr scientific advancement, thers raise mral cncerns.【翻译】虽然有些人认为这对科学进步至关重要，但其他人提出了道德问题。
【语言提升】　cncerned adj. 担心的；关心的；有关的　be cncerned abut担心；关心　Investrs weren’t cncerned abut shrt-term prfits ver the next few years.投资者不关心今后几年里的短期收益。
be cncerned with… 与……有关　This activity is cncerned with building a mre beautiful campus.这个活动与建设一个更美丽的校园有关。cncerning prep. 关于　as far as sb. be cncerned 在某人看来　As far as I’m cncerned, sprts are f great benefit t yu.在我看来，体育运动对你有好处。
【语境助记】　As far as I am cncerned, there’s n need t cncern yurself with this matter. Dn’t get invlved in what desn’t cncern yu. There are many imprtant things cncerning yu, s yu shuld be mre cncerned abut that.在我看来，你没有必要担心这件事。不要管那些与你无关的事情。与你有关的重要的事情很多，所以你更应该关心这样的事。
【针对练习】　单句语法填空　(1)________(cncern) abut the student, the teacher called his parents t find ut why he was s ften absent frm class.【答案】(1)Cncerned　
(2)As far as I’m ________(cncern), nt nly des utdr exercise get us clse t nature but als give relaxatin frm heavy schlwrk.(3)Yu shwed me sme phts ___________(cncern) envirnmental prtectin.【答案】(2)cncerned　(3)cncerning　
完成句子　(4)His jb __________ cmputer, s he is gd at perating the cmputers.他的工作与计算机有关，所以他很擅长操作计算机。【答案】(4)is cncerned with　
5．bund adj. 很有可能，肯定会　(P53)They believe it is bund t lead t clning f ther species, and they wrry abut the ethical questins this raises.【翻译】他们相信这必然会导致其他物种的克隆，并担心由此引发的伦理问题。
【语言提升】　be bund t d sth. 一定会做某事；有责任/有义务做某事　We are bund t cut dwn the expenses.我们必须要削减开支。They are bund t take time t readjust after a hliday.他们肯定需要时间重新适应假期结束后的生活。
bund fr… 准备前往……　I barded the plane bund fr England.我登上了飞往英格兰的飞机。
【针对练习】　单句语法填空　(1)Take it easy! Yu are bund ________(pass) the exam.(2)The plane bund ________ the fld-stricken area carried medical and fd supplies.【答案】(1)t pass　(2)fr　
完成句子　(3)Wars ___________ cast a shadw n peple arund the wrld.战争一定会给世界人民的心中留下阴影。【答案】(3)are bund t　
6．inferir adj. 低级别的，下级的；差的，次的　(P53)Furthermre, clnes may be viewed as mere cpies f riginals thus being seen as inferir.【翻译】此外，克隆可能被视为仅仅是原始物种的复制，因此被视为劣等物种。
【语言提升】　be inferir t劣于；次于　Mdern music is ften cnsidered inferir t that f the past.现代音乐常被认为不如过去的。
【归纳拓展】　be superir t优于；好于　I’ve persnally never agreed with the view that either sex is superir t the ther.我个人从未持有过一种性别比另一种性别优越的观点。
be senir t… 比……年长；比……级别高　My brther is senir t me by tw years.家兄比我年长两岁。be junir t… 比……年幼；比……级别低　My jb is t supervise peple wh are junir t me.我的职责是监督那些职位在我之下的人。
【针对练习】　单句语法填空　(1)These ranges are inferir ________ thse I bught last week.(2)It cannt be questined that the new methd is superir ________ the ld ne.【答案】(1)t　(2)t　
完成句子　(3)I was given the jb, despite the fact that Dminic _______ ____ me.尽管多米尼克的职位比我高，这项工作却分给了我。(4)His jb is t give instructins t peple ____________ him.他的职责是指导职位在他之下的人。【答案】(3)is senir t　(4)junir t　
(P53)…a huge breakthrugh that might lead t cures fr varius diseases and may als ffer clues n hw t prevent the aging prcess.【翻译】……这一个巨大的突破，可能会导致治疗各种疾病，也可能提供如何防止衰老过程的线索。
【句式剖析】　本句中hw t prevent为“疑问词＋不定式”结构，在句中作介词n的宾语。
I’m srry, I dn’t knw hw t answer the questin.对不起，我不知道如何回答这个问题。Chsing what t eat is n lnger as easy as it nce was. (作宾语)　选择吃什么已经不像以前那么简单了。It is said that when and where t have a meeting has been decided. (作主语)　据说，何时何地举行会议已经确定了。
The questin many students are puzzled abut is hw t learn English well. (作表语)　很多学生为之困惑的问题是怎样学好英语。I spent days thinking ver whether t take the jb r nt. (作宾语)　我用了好些天苦苦思考是否接受这个工作。
【针对练习】　单句语法填空　(1)I knw where ________(find) that infrmatin.(2)Once we were discussing where ________(g) fr an uting.(3)When and where ________(discuss) the issue hasn’t been decided yet.【答案】(1)t find　(2)t g　(3)t discuss　
完成句子　(4)Perhaps the mst difficult challenge is ___________ withut friends.也许最艰难的挑战就是，没有朋友的话应该怎样生存。【答案】(4)hw t survive　
【例句观察】　1．I have run ut f patience with her.2．I have been wrking in an advertisement cmpany in the last tw years.
3．When I reached the ffice, I realised that I had left an imprtant dcument at hme.4．Mr Smith tld us that he had been writing the nvel fr tw and a half years.
【我的领悟】　1．例句1中画线部分用的是________时态，这种时态的基本结构是________。2．例句2中画线部分用的是________时态，这种时态的基本结构是________。Keys：1．现在完成；has/have dne　2．现在完成进行；have/has been ding　
3．例句3中画线部分用的是________时态，这种时态的基本结构是________。4．例句4中画线部分用的是________时态，这种时态的基本结构是________。Keys：3．过去完成；had dne　4．过去完成进行；had been ding　
一、现在完成时　1．现在完成时的构成　主动形式：have/has dne　被动形式：have/has been dne　
2．现在完成时的用法　(1)表示过去的动作对现在的影响或结果，常用recently，lately，ever，never，befre，yet，s far，up till nw，since，fr a lng time，in/during the past/last few years，these days等作时间状语。
He hasn’t heard any news frm his sn lately.他最近没有听到他儿子的任何消息。S far n life has been fund utside the earth.到目前为止，在地球之外还没有发现生命。
(2)在时间或条件状语从句中，通常用现在完成时代替将来完成时，表示将来某一时刻前已完成的动作：　Tell me what yu think f the bk when yu’ve read it.你看完这本书后，告诉我你的想法。(3)“This/It is＋the＋序数词＋time＋that…” 句式中，that后的从句用现在完成时。This is the secnd time that I have visited the university.这是我第二次参观这所大学。
二、现在完成进行时　1．现在完成进行时的构成：have/has been ding　2．现在完成进行时的用法　(1)表示开始于过去某个时间、一直持续到现在而且会继续进行下去的动作。He has been lying in bed fr tw weeks.他已经在床上两周了。
(2)表示到目前为止的一段时间里一直反复进行的动作。I have been calling him several times this mrning，but there is n answer.我今天上午给他打了好几次电话，但没人接。
3．现在完成进行时与现在完成时的区别　现在完成进行时强调“动作”的持续性，表示“未完成”的含义；现在完成时则强调“时间”的经过或动作产生的“结果”，表示“已完成”的含义。I have watered the flwers.我已经给花浇过水了。(已完成：你不必浇了)　I have been watering the flwers.我一直在给花浇水。(未完成：一直在浇)　
三、过去完成时　1．过去完成时的构成　主动形式：had dne　被动形式：had been dne　
2．过去完成时的用法　(1)过去完成时表示过去某一时间或动作以前已经发生或完成了的动作，对过去的某一点造成的某种影响或结果，用来指在另一个过去行动之前就已经完成了的事件。When I wke up, it had already stpped raining.当我醒来时，雨已经停了。
(2)过去完成时常常用在tld, said, knew, heard, thught等动词后的宾语从句中，这时从句中的动作发生在主句表示的过去的动作之前。I thught I had sent the letter a week befre.我以为前一周我寄了那封信的。
(3)“This/It was＋the＋序数词＋time＋that…” 句式中，that后的从句用过去完成时。It was the third time that he had been ut f wrk that year.这是他那一年第三次失业。(4)by the time＋从句(从句用一般过去时)，主句用过去完成时。By the time I went utside，the bus had already left.我到外面去的时候，车已经开走了。
(5)N sner＋had sb. /sth. dne＋than (一般过去时) 表示“一……就……”　Hardly＋had sb. /sth. dne＋when (一般过去时) 表示“一……就……”　
N sner had he entered the rm than the telephne rang.他刚走进房间，电话铃就响了。Hardly had he gne t bed when there was a knck n the dr.他刚上床就听到敲门声。
四、过去完成进行时　1．过去完成进行时的构成：had been ding　2．过去完成进行时的用法　(1)过去完成进行时表示动作在过去某一时间开始，一直延续到这一过去时间。和过去完成时一样，过去完成进行时也必须以一过去时间为前提。I had been lking fr it fr days befre I fund it.这东西我找了好多天才找着的。
(2)表示反复的动作。Yu had been giving me everything.你对我真是有求必应。(3)过去完成进行时还可用在said，suppsed等引起的间接引语中，代替现在完成进行时。He said，“I have been speaking t Jhn. ”(直接引语)　＝He said that he had been speaking t Jhn. (间接引语)　
(4)过去完成进行时之后也可接具有“突然”之意的when分句。I had nly been reading a few minutes when he came in.我刚看了几分钟他就进来了。
Ⅰ．单句语法填空　1．Tm ________(wrk) in the library every night ver the last three mnths.2．In rder t find the missing child, villagers ________(d) all they can ver the past five hurs.【答案】1．has been wrking　2．have been ding　
3．They ________(wrk) n the prgramme fr almst ne week befre I jined them.4．They ________(plant) six hundred trees befre last Wednesday.5．S far we ________(learn) 3，000 English wrds.【答案】3．had been wrking　4．had planted　5．have learned　
6．The by was delighted with his new strybk which he ________(want) fr a lng time.7．The friendly relatins and cperatin between ur tw cuntries ________(strengthen) in the past few years.8．His brther was gd at playing table tennis. He ________ (play) it since he was ten.【答案】6．had been wanting　7．have been strengthened　8．had been playing　
9．The girl has a great interest in sprt and ________(take) badmintn classes twice a week ver the last three years.10．During the last three decades, the number f peple participating in physical fitness prgrammes ________(increase) sharply.【答案】9．has been taking　10．has increased　
Ⅱ．完成句子　1．It was midnight and he was tired because he __________ since dawn.已经是午夜了，他很累，因为他从天亮起就一直在工作。【答案】1．had been wrking　
2．In the last few years, China ____________________ in envirnmental prtectin.在过去的几年里，中国在环境保护方面取得了巨大的成就。【答案】 2．has made great achievements　
3．I ___________ the nvel by the time my mther came hme.到我妈妈回家的时候，我已经读完了这本小说。4．I ___________ the prgramme since fur years ag.我从四年前就开始从事这个项目了。【答案】3．had finished reading　4．have been wrking n　
5．Since the recent river pllutin in Shanxi Prvince, peple ____________________ t the water quality.自从山西省河流污染问题出现以来，人们一直越来越关注水质。【答案】5．have been paying mre and mre attentin　
6．Since the time humankind started gardening, we ___________ make ur envirnment mre beautiful.自从人类开始园艺，我们一直在努力使我们的环境更美丽。【答案】 6．have been trying t　
7．There ___________ here fr nearly tw mnths.这里已经近两个月没下雨了。8．The telephne ___________ fr three minutes befre it was answered.电话铃响了三分钟才有人接。【答案】7．has been n rain　8．had been ringing　
9．The man ___________ in the sun fr a lng time and gt his face burnt.那个人在太阳下站了很长时间，脸都晒伤了。10．N sner ____________________ the TV than there was a pwer failure.她刚打开电视就停电了。【答案】9．had been standing　10．had she turned n　
Ⅰ．单词拼写　1．The majrity f cntracts give the publisher the right t ________(编辑) a bk after it’s dne.2．The parents have n right t ________(虐待) their children.3．It is bviusly an unfair ________(比较).【答案】1．edit　2．abuse　3．cmparisn　
4．These apples are ________(次的) t thse n the shelf.5．The tw pictures are similar, althugh nt ________(完全相同的).6．Lack f cnfidence is a psychlgical ________(障碍) t success.7．It tk her a ________(仅仅) 20 minutes t win the chess game.【答案】4．inferir　5．identical　6．barrier　7．mere　
8．He regained his listening after receiving ________(治疗).9．My heart was beating wildly but I didn’t let my face shw any ________(情感).10．Parents play a(n) __________(至关重要的) rle in preparing their child fr schl.【答案】8．treatment　9．emtin　10．crucial　
Ⅱ．单句语法填空　1．If yu take n the prject, yu are bund ________(meet) with difficulties.2．They agreed t g ________(mere) because they were getting paid fr it.3．Rivers are a ________(bless) fr an agricultural cuntry.【答案】1．t meet　2．merely　3．blessing　
4．They have kept the price f sugar ________(artificial) high.5．It was ________(whle) different frm what we had expected.6．The plice were trying t seek fr all pssible ________ (clue) n the murder.【答案】4．artificially　5．whlly　6．clues　
7．We shuld train ur students t speak English fluently and ________(accurate).8．Mthers are ften the nes wh prvide ________ (emtin) supprt fr the family.9．I ________(wrk) fr sme time when he called.10．Air pllutin ________(take) the lives f many peple.【答案】7．accurately　8．emtinal　9．had been wrking　10．has taken　
Ⅲ．完成句子　1．By the time he was twelve, he ________________ mre than 20 cuntries.到12岁时，他已经去过20多个国家。【答案】1．had travelled t　
2．He ___________ the nvel fr three hurs and he ___________ it.这本小说他已经看了三个小时了，还没有读完。3．I thught that he ____________________ learning English in the past tw hurs in the rm.我原以为他在房间里两个小时以来一直在专心学习英语。【答案】2．has been reading；hasn’t finished　3．had been absrbed in