Do you know why different animals or pests(害虫) have their special colors? Colors in them s

Do you know why different animals or pests(害虫) have their special colors? Colors in them seem to be mainly used to 1 themselves.
Some birds like eating locusts(蝗虫), but birds cannot 2 catch them. Why? It is because locusts change their 3 with the change of the colors of crops. When crops are green, locusts look 4 . But as the harvest time comes, locusts change into the same brown color 5 crops have. Some other pests whose colors are 6 plants are easily found and eaten by 7 . So they have to hide themselves for lives and appear only 8 .
If you 9 animals’ life, you’ll find the main use of colors is to protect 10 . Bears, lions and other animals 11 quietly through forests. They cannot be easily seen by hunters 12 their colors are much like the trees.
Colors are useful not only on the land, but also in the 13 . A kind of fish can 14 a kind of black liquid(液体) when they face danger. The liquid spreads over quickly, so they cannot be found by their enemies and can quickly swim away. That is 15 they can live safely though they are not strong at all. So colors are really useful to animals.
【小题1】A．showB．protectC．killD．interest【小题2】A．easilyB．freelyC．safelyD．differently【小题3】A．sizesB．smellsC．colorsD．shapes【小题4】A．yellowB．redC．blackD．green【小题5】A．soB．asC．likeD．with【小题6】A．different fromB．same asC．similar toD．opposite with【小题7】A．otherB．othersC．the othersD．another【小题8】A．in the morningB．at noonC．at nightD．in the daytime【小题9】A．studyB．writeC．drawD．work【小题10】A．themB．themselvesC．itD．itself【小题11】A．runB．fightC．moveD．eat【小题12】A．becauseB．soC．andD．although【小题13】A．forestsB．desertC．seaD．mountains【小题14】A．keep outB．come outC．look outD．give out【小题15】A．whyB．whenC．howD．whereB

(答案→)B 解析：这篇短文主要介绍了动物的一种自我保护方法，他们通过改变自身颜色来适应周围环境，不让敌人发现自己。【小题1】联系下文描述，可知此处指的是他们的颜色主要是用来保护他们自己，故选B，保护。【小题2】副词辨析。A. 容易地；B.自由地，免费地；C. 安全地；D. 不同地。联系下文描述，可知此处指的是鸟类不能轻易地捉住他们，故选A。【小题3】联系下文with the change of the colors of crops.描述，可知此处指的是随着庄稼物的颜色改变他们的颜色，故选C，颜色。【小题4】联系前文When crops are green, 描述，可知此处指的是他们看起来是绿色的，故选D，绿色的。【小题5】词义辨析。A. 因此；B. 作为，如同；C.和……一样；D.带有，伴随。结合语境可知此处指的是变成和庄稼一样的颜色。选项C是介词，不能引导从句，故选B。【小题6】短语辨析。A. 与……不同，不同于；B.和……一样；C. 与……相似；D. 搭配错误，opposite一般和to搭配使用，表示与……相反。结合语境可知此处指的是颜色不同于庄稼的害虫，故选A，不同于。【小题7】词义辨析。A. 另外的，其它的；B. 其它人；C. 其余的；D. 多个中的另一个。结合语境可知此处指代的是其它动物，故选B。【小题8】结合语境可知此处指的是他们只在夜间出现，故选C，在夜间。【小题9】动词辨析。A. 学习，研究；B. 写作；C. 绘画；D.工作，运作。句意：如果你研究动物们的生活，故选A。【小题10】结合语境可知此处指的是颜色的主要作用是保护他们自己，故选B，他们自己。【小题11】动词辨析。A.奔跑；B. 打架，战斗；C. 移动，感动；D.吃。结合语境可知此处指的是这些动物在森林里面静静地移动，故选C。【小题12】连词辨析。A.因为；B. 因此；C. 和，并且；D. 虽然，尽管。句意：因为他们的颜色和数目非常一样，他们不能轻易地被猎人发现。故选A。【小题13】联系后一句描述，可知此处指的是在海洋当中。故选C，海洋。【小题14】短语辨析。A. 阻止进入；B.出现，出版；C.注意，照料；D. 分发，发表。结合语境可知此处指的是一种鱼能喷一种黑色的液体。故选D。【小题15】疑问词辨析。A. 为什么；B. 什么时候；C. 如何，怎样；D. 在哪儿。结合语境可知此处指的是那就是为什么他们一点也不强壮却能安全地生活的原因。故选B。

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