1、Unit 2 CloningSection Warming Up,Pre-reading,Reading ,we should try our best to rebuild our houses. 答案:on the other hand三、单句改错1Customs different in different countries.答案:第一个 differentdiffer2Three stones cast to the dog before it was driven out.答案:cast 前加 were3The two-day break can release the stude
2、nts,but on the one hand,the children may waste too much time on TV or Internet games.答案:oneother4It can be difficult clone a tiger in a short time.答案:clone 前加 to5His patience has paid back and he has won the match.答案:backoff四、阅读理解 AThe United States government wants to know what the public thinks ab
3、out its findings on the safety of cloned animals.The Food and Drug Administration(FDA) says meat and milk from clones of adult cattle,pigs and goats are safe to eat.An FDA official called them “as safe to eat as the food we eat every day”.And when those clones reproduce sexually(有性繁殖),the agency say
4、s,their offsprings(后代) are safe to eat as well.But research on cloned sheep is limited.So the FDA proposes that sheep clones not be used for humans food.The United States could become the first country to approve the sale of foods from cloned animals.First,however,the public will have ninety days to
5、 comment on three proposed documents.On December 28th the FDA released a long report,called a draft risk assessment,along with two policy documents.The agency says it must receive comments by April 2nd.The FDA seemed ready to act several years ago,but an advisory committee called for more research.F
6、or now,the government will continue to ask producers to honour a request that they not sell foods from cloned animals.Clones are still rare.They cost a lot and are difficult to produce.The FDA says most food from cloning is expected to not come from clones themselves,but from their sexually reproduc
7、ed offsprings.It says clones are expected to be used mostly as breeding animals to spread good qualities.Public opinion studies show most Americans do not like the idea of food from cloned animals.But this research also shows the public knows little about cloning.Cloning differs from genetic enginee
8、ring.A cell taken from a so-called donor animal is grown into an embryo(胚胎)in the laboratory.Next,the embryo is placed into the uterus(子宫)of a female animal.If the process is successful and the pregnancy reaches full term,a genetic copy of the donor animal will be born.1From the passage we know that
9、 . A.foods from cloned animals are popular in America B.cloned adult animals are safe to eat except sheep C.cloned animals will be easy to produce D.most foods from cloning are expected to take place of other foods 答案:B解析:推理判断题。从文中第二段可推出,除克隆绵羊外,其他克隆动物吃起来是安全的。2The main purpose of the text is to . A.t
10、ell an interesting storyB.give some advice on foods C.give a reportD.compare different opinions 答案:C解析:主旨大意题。本篇文章是关于克隆食物的安全问题的报道。3Who believe(s) that most foods from cloning are safe to eat?A.Most Americans. B.An advisory committee.C.Critics. D.The FDA.答案:D解析:细节理解题。从第二段第一句“The Food and Drug Administ
11、ration(FDA) says meat and milk from clones of adult cattle,pigs and goats are safe to eat.” 可知。4It can be inferred from the last paragraph that . A.cloning has much in common with genetic engineeringB.not every cell taken from a donor animal can grow into a genetic copy C.the donor animal should be
12、a female one D.cloned animals grow faster than normal ones答案:B解析:推理判断题。从最后一段中的 “If the process is successful and the pregnancy reaches full term,a genetic copy of the donor animal will be born.”可知答案。BAuthors Kyle Kurpinski and Terry D.Johnson pretty much have me convinced that human cloning is quite
13、 possible and is a future certainty.Kurpinski and Johnson are both bioengineering experts;unlike similar scientists you have seen in the movies,they both have a sense of humour.What surprises me is that Kurpinski and Johnson are able to take something as complicated as DNA and make it understandable
14、.The book How to Defeat Your Own Clone teaches us what is now known as DNA-encoded(编码),how that happens,and why people with similar DNA dont look or act the same.The book not only helps us get a basic understanding of what DNA and its purpose are,but also explains cloning and stem cell(干细胞) research
15、.It occurs to me that a lot of people who are against stem cell research dont know what they are protesting about.The authors provide a history of cloning,as well as information about stem cells.The real fun starts when the authors attack various myths about cloning.Obviously,too many people have be
16、en watching too many bad movies and television programs.Remember theyre just fictional stories.If,somehow,scientists manage to clone you,twenty years from now your clone isnt going to kill you.Among the myths explored and exploded are that a clone will know everything you know and will act as you do
17、,that heads which are cut off can be kept alive,and that a clone has no belly button(肚脐).Many of the myths are ridiculous but many people believe them.Kurpinski and Johnson also detail some bio-improvements “that really work”.You see,genes can be controlled to help you sleep better and become smarte
18、r,healthier,and taller.Well.not exactly you,but future generations.If you do wind up in a battle with your own clone,who will be considerably younger than you,remember that it is not you and that it doesnt know what you know.5Many bioengineering experts in movies are . A.humorous B.wealthy C.serious
19、 D.crazy答案:C解析:推理判断题。从第一段中的“.unlike similar scientists you have seen in the movies,they both have a sense of humor.”可知电影中的生物工程学家一般都是没有幽默感的。6Which of the following things are in the book How to Defeat Your Own Clone?a.What DNA and its purpose are.b.Who is against cloning.c.The history of cloning.d.Th
20、e myths about cloning.e.The disadvantages of cloning.A.a,b,e B.a,c,d C.b,d,e D.b,c,d答案:B解析:细节理解题。从第二段中的“The book not only helps us get a basic understanding of what DNA and its purpose are.The authors provide a history of cloning.”及第三段中的“The real fun starts when the authors attack various myths abou
21、t cloning.”可知答案。7We can learn from the passage that biotechnology . A.has been banned in many countries around the worldB.is being used to improve ones intelligence right nowC.can help improve the physical condition of future generationsD.is sure to cure any disease in the near future答案:C解析:推理判断题。从第
22、四段中的“.genes can be controlled to help you sleep better and become smarter,healthier,and taller.Well.not exactly you,but future generations.”可知 C 项正确。8According to the passage,a clone of you . A.will want to kill you B.knows whatever you knowC.has no belly button D.will be younger than you答案:D解析:细节理解
23、题。从最后一段中的“who will be considerably younger than you” 可知 D 项正确。9The passage was written mainly to . A.predict the future of cloningB.introduce two bioengineering expertsC.review a book on cloningD.protest against movies about cloning答案:C解析:目的意图题。第一段主要描述了 How to Defeat Your Own Clone 一书作者的情况和写作风格,第二、三
24、、四段主要介绍了此书的内容并发表了相关感想,最后一段是其他一些感想,由此可见本文的主要目的是记录此书的读后感。五、短文改错Should parents rent house near their childrens schools so that they can stay with their children?There is various opinions.Some people are for an idea.In their opinion,parents can look after their children by staying with them so that thei
25、r children can put their hearts into studies.Moreover,parents can prevent their children fall into bad habits like smoking or being addicted on the Internet.Others,however,hold the opposite opinion.They argue that students should learn to care for them instead of depending on their parents,which is
26、very importantly for their future.Besides,it is waste of money and time for parents to rent another house.In my opinion,we students are old enough and to have the ability to look after ourselves.Theres no need for parents to do everything for us.We should start taking some responsibility for ourselves and well never grow up.答案:第一句:househouses第二句:isare第三句:anthe第五句:fallfalling;onto第七句:themthemselves;importantlyimportant第八句:waste 前加 a第九句:去掉第一个 to第十一句:andor
