Question

【题目】The color of animals is by no means a matter of chance; it depends on many considerations, but in the majority of cases tends to protect the animals from danger by making it less outstanding Perhaps, it may be said that if coloring is mainly protective, there ought to be fewer brightly colored animals. 【1】. The kingfisher itself, though so brightly colored, is not easy to see.

【2】. Thus, for instance, the lion, and the wild donkey are all sand—colored. “Indeed, in the desert, neither trees, brushwood, nor even undulation (起伏) of the surface afford the slightest protection to its enemies.【3】.” says an expert.

The next point is the color of the mature caterpillars(毛虫), some of which are brown. This probably makes the caterpillar even more outstanding among the green leaves. What would you do if you were a big caterpillar? Why, like most other defenceless creatures, you would feed by night, and lie hidden by day. 【4】. When the morning light comes, they go down the stem of the food plant, and hide among dry sticks and leaves around the ground, and it is obvious that under such circumstances the brown color really becomes a protection. While we may say as a general rule that the large caterpillars feed by night and hide by day, it is by no means always the case that they are brown: some of them still remain green.【5】, and that the brown color is a later adaptation.

A. So do these caterpillars

B. Therefore, the color of the animals is bright

C. We can say that they formed a good habit

D. Desert animals are generally the color of the desert

E. We may conclude that the habit of hiding themselves by day comes first

F. However, there are some cases where vivid colors are themselves protective

G. So the color of birds, snakes and even smaller animals, is of one uniform sand color

Answer 1

【答案】

【1】F

【2】D

【3】G

【4】A

【5】E

【解析】这是一篇议论文。本文主要讲了动物的身上的颜色是具有保护性的，他们会因生活区域的不同而颜色不同，例如在沙漠中的动物大多是沙色的。

【1】空前一句提到如果动物的颜色是具有保护性的，那么颜色鲜艳的动物应该更少。后一句提到翠鸟本身虽然颜色鲜艳，但不容易看到。可知，前后矛盾，所以该空是转折句，对前一句的否定，所以F选项“然而，在某些情况下，鲜艳的色彩本身就是保护性的。”切题，空后一句提到的翠鸟与该选项相呼应。

【2】根据空后的for instance，该句是总结句，for instance后的句子是证明该句是正确的。故D选项“沙漠动物通常是沙漠的颜色。”切题。选项中的 Desert animals 对应文中的in the desert。

【3】上一句提到在沙漠中，树木，草丛都不会对他们起到保护作用。该句说明的是具有沙漠色的重要性，故G选项“因此，鸟类，蛇类甚至小动物的颜色都是一种均匀的沙色。”切题。

【4】上一句提到“像大多数其他没有防御能力的生物一样，你会在夜间喂食，白天隐藏起来。”下一句讲的是棕色的毛虫白天是怎样隐藏的，所以该句讲的是棕色的毛虫和其他没防御能力的动物一样需要躲藏。故A“这些毛毛虫也是如此。”切题。

【5】上一句提到那些晚上觅食白天躲藏的毛虫并不总是棕色的，他们中有一些是绿色的。也就是说不管是什么颜色的毛虫，都会有白天躲藏的习惯。所以E选项“我们可以得出结论，白天隐藏自己的习惯是首要的。”切题。