1819 Unit 2 Section Ⅰ　Reading Warming UpPre­readingReadingComprehending

1、Unit 2Cloning大家对于克隆这一话题并不陌生，但是到底什么是克隆，如何才能够进行克隆等细节性问题对于大部分人来说还是很神秘的。What is CloningHave you ever wished you could have a clone of yourself to do your homework while you went out to play with your friends？Imagine if you could really do that，where would you start? 1 Cloning is a way of making an organ

2、ism(有机体) that is an exact genetic(基因的) copy of another.This means that every single bit of DNA is the same between the two!You might not believe it，but there are human clones among us right now. 2 They're identical(同样的) twins，created naturally.Below，we'll see how natural identical twins rela

3、te to modern cloning technologies. 3 You may have first heard of cloning when Dolly the sheep showed up on the scene in 2019.Cloning technologies have been around for much longer than Dolly，though. 4 There are a couple of ways to do this：artificial embryo twinning(人工胚胎双生) and somatic cell nuclear tr

4、ansfer(体细胞核移植)How do these processes differ?1Artificial Embryo TwinningArtificial embryo twinning is the relatively lowtech version of cloning.As the name suggests，this technology mimics the natural process of creating identical twins.2Somatic Cell Nuclear TransferSomatic cell nuclear transfer (SCNT

5、)，uses an approach different from artificial embryo twinning，but it produces the same result：an exact clone，or a genetic copy，of another.This was the method used to create Dolly the sheep.根据短文内容，从下面所给选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。AWhat can be cloned?BHow does one go about making an exact genetic copy

6、 of an organism?CWhat exactly is cloning?DHow is cloning done?EThey weren't made in a lab，though.FWhere is cloning done?【答案】14CEDBSection Reading (Warming Up，Pre­reading，Reading & Comprehending)新生词汇初识. 匹配下列单词的词性及汉语意思1obtainAvi.不同；相异2forbid Bvt.着手；从事；承担3differ Cvt.扔；投；掷4attain Dvi.反对；不赞成

7、5accumulate Evt.获得；赢得6undertake Fvt.获得；到达(水平、年龄、状况等)7object Gvt.禁止；不准8exact Hvt.& vi.积累；聚积9breakthrough Iadj.精确的；准确的10cast Jn.突破【答案】15EGAFH610BDIJC.选择下列句中相对应词组的汉语意思A得到好结果B反对；抗议C与不同D使失望；使沮丧E支持；赞成F对有影响1I object to the plan because it would be too expensive. 2He has been very much cast down by his

8、failure in the examination.3Believe me，all your efforts will pay off some day. 4We agreed that Mr.White works as our new manager because of the fact that more than 90% of the board members are in favour of him. 5French differs from English in this respect. 6The concept of living a low­carbon li

9、fe has an impact on our environment. 【答案】16BDAECF教材语篇细研第一步速读了解文章主题和段落大意速读P1112教材课文，匹配段落大意1Para.1AThe problems of Dolly the sheep2Para.2 BThe two major uses of cloning3Para.3 CThe attitudes towards Dolly's appearance4Para.4 DThe definition of cloning5Para.5 EThe effects of cloning in society【答案】1

10、5DBACE第二步细读把控文章关键信息细读P1112教材课文，选择最佳答案1It can be inferred from the passage that a cloned animal Ausually lives as long as the original oneBusually lives longer than the original oneCusually dies earlier than the original oneDis usually as healthy as the original one2Which of the following is an advan

11、tage of cloning?ACloning can be used for earning money.BLarge quantities of food can be produced by cloning.CCloning can not help keep animals from becoming extinct.DFamous persons who have passed away can be cloned.3We can use the skill of cloning to Abring about global peaceBcreate other famous sc

12、ientistsCimprove the development of learning languageDcure some special diseases4What can we learn from the text?ACloned mice can live as long as the original ones.BCloning will come to an end because of objections.CAll the researches into human cloning will be forbidden.DIt is more difficult to clo

13、ne animals than clone plants.【答案】14CBDD第三步精读能力升华接轨高考精读P1112教材课文，在空白处填入1个适当的单词或括号内单词的正确形式。Cloning is a way of making an 1.exact(exactly)copy of another animal or plant.Cloning plants is straightforward 2.while cloning animals is very complicated.It is a difficult task 3.to undertake(undertake)Many at

14、tempts to clone mammals failed.But at last the determination and patience of the scientists paid 4.off in 2019 with 5.a breakthroughthe cloning of Dolly the sheep.Dolly's appearance raised a storm of 6.objections(object)and had a great impact on the 7.media(medium)and public imagination.Altogether Dolly 8.lived(live)six and a half years，half the length of the life of the original sheep.At present some countries began to refor