作业帮完形填空阅读下列短文，从文后各题所给的四个选项中选出一个最佳答案。Do you know why different a
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/11/08 21:46:36
| 完形填空 阅读下列短文，从文后各题所给的四个选项中选出一个最佳答案。 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.
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小题1:B
小题2:A
小题3:C
小题4:D
小题5:B
小题6:A
小题7:B
小题8:C
小题9:A
小题10:B
小题11:C
小题12:A
小题13:C
小题14:D
小题15:A
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