1、成才之路 英语路漫漫其修远兮 吾将上下而求索人教版 选修8CloningUnit 2话 题 引 入In the movie Jurassic Park，scientists clone dinosaurs byusingtheDNAthatwaspreservedformillionsofyearsHowever，there is trouble when the cloned dinosaurs turnout fiercer and smarter than expectedCan dinosaurs really becloned？Theoretically，they can；all t
2、hat would be required isDNA from an extinct dinosaur and a currently living closely relatedspecies which would act as a surrogate mother(代孕母亲)Infact，there is continuing research to clone the Woolly Mammoth byextracting(提取)the DNA from frozen animalsActually，cloning is a phenomenon that occurs natura
3、lly in awide variety of speciesWhenever you see a pair of identicaltwins，they are examples of natures clonesAlthough scientistshave been cloning certain plants like the carrot quite successfullyfor decades，attempts at cloning animals have not been assuccessfulHowever，they began long before the birth
4、 of Dolly，the sheepthe first mammal to be successfully clonedCloning humans does give rise to some misgivings，raising anumber of moral problems involvedIn fact，the social influencesof producing humans artificially were brilliantly explored in thefamous novel Brave New World by Aldous Huxley，and also
5、 in themovie The IslandHuman cloning is basically about creating a genetically(基因地)identical copy of a previously existing personWhy wouldsome people choose to clone human beings？Well，generally，itcould make couples unable to have babies have their ownchildrenReplacing a dead child is also another re
6、ason why somepeople have expressed interest in the technology文章大意：本文是说明文。介绍了克隆的相关情况。1The purpose of the first paragraph is to _Agive us an introduction to a movie Banalyse the possibility of cloningCgive an introduction to the textDtell us the importance of cloning答案：C 从后文内容可知，第一段主要是为了引出下文。2In what
7、way is human cloning useful？AIt can bring a dead person back to lifeBIt makes it possible to replace a dead childCIt can help cure some human diseasesDIt can help people have more healthy children答案：B 从最后一段可知，克隆人可以替代一个死了的孩子或者帮助不孕夫妻受孕。3What does the underlined word“misgivings”in the thirdparagraph me
8、an？AWorries BAimsCRegulationsDPrinciples答案：A 从该词后的raising a number of moral problemsinvolved可知，克隆人引起了很多担忧。4What attitude do people have towards human cloning？AThey think human cloning is uselessBThey believe it can help humans in many waysCThey believe it can cause many moral problemsDThey doubt whether it can succeed or not答案：C 从第三段可知，克隆人一直是一个存在争议的问题，涉及很多道德问题。
