Question

【题目】Do you know why different animals or pests (昆虫) have their special colors? Colors in them seem to be used mainly to protect themselves.

Some birds like eating locusts (蝗虫), but birds cannot easily catch them. Why? 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 the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear(出现) only at night.

If you study the animal life, you’ll find the main use of coloring is to protect(保护) themselves. Bears, lions and other animals move quietly through forests. They cannot 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 act? A kind of fish in the sea can send out a kind of very black liquid (液体)when it faces danger. While the liquid spreads over (散开), its enemies (敌人)cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all.

【1】From the passage we learn that locusts________.

A. are small animals

B. are easily found by birds

C. change their colors to protect themselves

【2】How can pests with different colors from plants keep out of danger?

A. They run away quickly.

B. They have the colors much like their enemies.

C. They hide themselves by day and appear at night.

【3】Bears and lions can keep safe because _________.

A. they have the colors much like the trees

B. they move quietly

C. they like brown and gray colors

【4】Why can the kind of fish live up to now?

A. Because it is very and strong.

B. Because the liquid it sends out can help it escape from its enemies.

C. Because the liquid it sends out can kill its enemies.

【5】Which is the best title for this passage?

A.The Change of Colors for Animals and Pests

B.Colors of Different Animals and Pests

C. The Main Use of Colors for Animals and Pests

Answer 1

【答案】

【1】C

【2】C

【3】A

【4】B

【5】C

【解析】

【1】细节理解题。根据It is because locusts change their colors together with the change of the colors of crops(庄稼). you’ll find the main use of coloring is to protect themselves.等信息表明蝗虫通过改变颜色来保护自己。可知选C。

【2】细节理解题。根据So they have to hide themselves for lives and appear only at night.因此为了活下来，他们不得不躲起来，只有晚上才出来活动。可知应选C。

【3】细节理解题。根据This is because they have the colors much like the trees.“这是因为他们有着和树一样的颜色”，这样他们才不容易被猎人发现。故选A。

【4】细节理解题。根据While the liquid spreads over , its enemies cannot find it.“这种液体能迅速扩散，敌人不能找到它。”可见它排出的液体帮助它脱逃。可知故选B。

【5】归纳理解题。通过文章列举的几个动物来自我保护的例子都是与颜色有关，故可推出文章的主题是动物的颜色的作用。故选C。