小学英语阅读理解练习题及答案（十）

　　Do you know why different animals or insects(昆虫) have their special colors？ Colors are used mainly to protect themselves.

　　Why can‘t some birds easily catch locusts(蝗虫)？ It is because locusts change their colors together with the change of the colors of crops(庄稼). When crops are green， locusts look green. But as autumn comes， locusts change to the same brown color as crops have. Some other insects with different colors from plants are easily found and eaten by others. So they have to hide themselves in the day and appear only at night.

　　If you study the animal life， you’ll find the main use of coloring is to protect themselves. Bears， lions and other animals can‘t be easily seen by hunters(猎人). This is because they have the colors much like the trees.

　　Have you ever noticed an even stranger thing？ A kind of fish in the sea can send out black liquid(液体) when it faces danger. While the liquid spreads over (散开)， its enemies(敌人) can’t find it. And it quickly swims away. So it has lived up to now though it is not strong at all.

　　26. From the article we learn that locusts    .

　　A. are dangerous to their enemies

　　B. are easily found by birds

　　C. change their colors to protect themselves

　　D. are small animals

　　27.How can insects with different colors from plants keep out of danger？

　　A.they have to move quietly

　　B.they hide themselves in the day and appear at night

　　C.they have the colors much like their enemies

　　D.they run away quickly

　　28. Bears and lions can keep safe because        .

　　A. they live in forests

　　B. they like brown and grey colors

　　C. they move quietly

　　D. they have the colors much like the trees

　　29. Why can a kind of fish in the sea live up to now？ Because    .

　　A. it is very big and strong

　　B. the liquid it sends out can help it swim away from its enemies

　　C. the liquid it sends out can kill its enemies

　　D. it swims faster than any other fish

　　30.Which is the best title(标题) for this passage？

　　A.How animals protect themselves

　　B.Colors of Different Animals and Insects

　　C.The Change of Colors for Animals and Insects

　　D.The Change of Different Animals and Plants

 

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