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7.Every living thing has genes.Genes carry information.(36)G They make sure that humans give birth to humans and cows give birth to cows.They also make sure that a dog doesn't give birth to a frog,or an elephant to a horse.However,genetic engineers take genes from one species-for example,a snake,and transfer them to another-for example,corn. (37)F Such new life forms have been described,by some scientists as a real-life Frankenstein.
Genetic engineers put duck genes into chicken to make the chickens bigger.They put hormones(激素)into cows to make them produce more milk.They put genes from flowers into beans and from fish into tomatoes.(38)C It just makes them easier and faster for the farmer to grow.
The effects of genetic engineering on the natural world may be disastrous.The engineers may create strange life beings,or monsters.that we cannot contro1. (39)D They'11have to find one,fight for one-or kill for one.It may be your land they fight for-or you that they kill.Moreover,the effects of these experiments can often be cruel.In America,pigs were given human genes to make them bigger and less fatty.The experiment failed.The pigs became very ill and began to lose their eyesight.
We would all like a better,healthier and longer life,and genetic engineering might give us this.On the other hand,it may be a dangerous experiment with nature.In the story of Frankenstein,the doctor created such a terrible and dangerous monster that he had to destroy it.(40)B

A.The information tells us what to do or what not to do.
B.We must make sure that this tale remains a story-and no more than that.
C.This doesn't make them cheaper,tastier,or healthier.
D.The new life forms have no natural habitat or home.
E.Then they feed the tomatoes to the fish.
F.In this way a new life form is created.
G.They are passed on from generation to generation.

分析 每种生物都有基因.基因携带信息,使得物种稳定地代代相传,然而基因工程师可以通过剪切基因来形成新的物种.这一方面可以使我们生活过的更好更健康,但是也会带来未知的危险和灾难.

解答 36.G.上文说基因承载着信息,下文说他们使人能够生出人,牛生牛,也就是说基因是代代相传的,即They are passed on from generation to generation,故选G.
37.F.根据上文genetic engineers take genes from one species-for example,a snake,and transfer them to another-for example,基因工程师从一种物种上提出基因,转移到另一物种上.这样新的物种就形成了,故选F.
38.C.由下文的 It just makes them easier and faster for the farmer to grow,对农民来说,他们只是更容易生长,可知,C项"这没有使他们更便宜,更好吃或者更健康"符合语境.故选C.
39.D.由下文的They'11have to find one,fight for one-or kill for one,他们将不得不为找一个栖息地而斗争或者厮杀,也就是说他们没有天然的栖息地,故选D.
40.B.由上句In the story of Frankenstein,the doctor created such a terrible and dangerous monster that he had to destroy it,故事中医生创造了可怕的物种,所以不得不消灭它,因此,We must make sure that this tale remains a story-and no more than tha,我们只能确保这只是一个故事,不让其真的发生,故选B.

点评 本篇七选五较为简单,句子都是通过上一句或下一句句意就可以选出,不需要太多对全文的把握.主要考察考生对句子的理解力和简单的逻辑推理能力.

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