1、Unit 2Cloning1996年克隆羊多莉的诞生，就已为克隆人做好了技术上的准备。也使关于克隆人的争论变得更加现实。Human cloning is the creation of a genetically identical copy of an existing or previously existing human.Despite several highly public claims，human cloning still appears to be a fiction.There is no solid scientific evidence that anyone has
2、 cloned human embryos at present.In 2004，a group in South Korea published a paper in the journal Science in which it claimed to have created a cloned human embryo in a test tube.However，an independent scientific institute later found no proof to support the claim and，in January 2006，Science announce
3、d that the paper had been withdrawn.In January 2008，Dr Samuel Wood and Dr Andrew French in California announced that they successfully created the first 5 fully grown human embryos using DNA from adult skin cells，aiming to provide a source of viable embryonic stem cells.But Dr Wood stated that if th
4、at were possible，using the technology for reproductive cloning would be both immoral and illegal.The 5 cloned embryos were destroyed.The various forms of human cloning are controversial.Most scientific，governmental and religious organizations oppose reproductive cloning.Therefore，some people have co
5、nsidered the idea of growing organs separately from a human organismin doing this，a new organ supply could be established without the moral problem of harvesting them from humans.1genetically adv.从遗传学角度，从基因角度2viable adj. 切实可行的，有望实现的3reproductive adj. 生殖的，再生产的1What is human cloning?Human cloning is a
6、 creation of genetically identical copy of an existing or previously existing human.2Which country is the first to claim to have created a cloned human embryo?South Korea.Section Warming Up & ReadingPreparing根据提示写出下列单词1 vi.不同；相异2 vt. 着手；从事；承担3 vt. 扔；投；掷4 vi. 反对；不赞成5 vt. 获得；赢得6 vt. 获得；到达(水平、年龄、状况等)7
7、vt. 禁止；不准8 vt.&vi. 积累；聚积9 adj. 精确的；准确的10 n. 突破【答案】1.differ2.undertake3.cast4.object5obtain6.attain7.forbid8.accumulate9exact10.breakthrough看单词学构词：breakthrough为合成词，由break和through构成类似单词还有breakup“破裂”；breakdown “失败，损坏，破裂”等。根据提示补全下列短语1pay 得到好结果；取得成功；偿清2 the one hand 一方面3cast 使失望；使沮丧4have an impact 对有影响5
8、present 目前；现在6 favour of 赞成；支持【答案】1.off2.on3.down4.on5.at6.in根据提示补全下列教材原句1Cloning plants is straightforward while cloning animals is very complicated.克隆植物简单而克隆动物非常复杂。2Then came the disturbing news that Dolly had become seriously ill.接着传来了多莉病重的坏消息。3However，scientists still wonder whether cloning will
9、 help or harm us and where it is leading us.然而科学家们仍对克隆技术有助于人类还是有害于人类以及它将把我们引向何处感到困惑。阅读P1112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
10、 healthy as the original one2Which of the following is an advantage 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
11、 of cloning to Abring about global peaceBcreate other famous scientistsCimprove 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 research into
12、 human cloning will be forbidden.DIt is more difficult to clone animals than clone plants.5We can infer from the last three paragraphs that Athe normal development of Dolly had no effect on the cloning of other speciesBDollys serious disease and final death disturbed the whole worldCDolly successful
13、ly cloned a new lamb with the help of cloning scientistsDthere were arguments about animal cloning and concerns about the future of cloning【答案】15CBDDD阅读P1112课文，在空白处填入适当内容(1个单词)或括号内单词的正确形式Cloning is a way of making an 1. (exactly)copy of another animal or plant.Cloning plants is straightforward 2. cl
14、oning animals is very complicated.It is a difficult task 3. (undertake)Many attempts to clone mammals failed.But at last the determination and patience of the scientists paid 4. in 1996 with 5. breakthroughthe cloning of Dolly the sheep.Dollys appearance raised a storm of 6. (object)and had a great
15、impact on the 7. (medium)and public imagination.Altogether Dolly 8. (live)six and a half years，half the length of the life of the original sheep.At present some countries began to reform their legal systems and 9. (forbid)research into human cloning，but other countries like China and the UK，continued to accumulate evidence of the abundant 10. (medicine)aid that cloning could provide.【答案】1.exact2.while3.to undertake4.off5.a6.objections7.media8.lived9.forbade10.medical