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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