Question

Do you know why different animals or pests have their special colours? Colours in them seem to be used mainly to protect themselves.

Some birds like eating locusts，but birds cannot easily catch them. Why? It is because locusts change their colours together with the change of the colours of crops. When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown colour as crops have. Some other pests with different colours from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.

If you study the animal life, you’ll find the main use of colouring is protecting themselves. Bears, lions and other animals move quietly through forests. They cannot be seen by hunters. This is because they have the colours much like the tree.

Have you ever noticed an even more strange act? A kind of fish in the sea can send out a kind of very black liquid when it faces danger. While the liquid spread over, the enemies cannot find it. And it immediately swims away. So it has lived up to now though it isn’t strong at all.

1.From the passage we can learn that locusts       .

A. are small animals

B. are easily found by birds

C. are dangerous to their enemies

D. change their colours to protect themselves

2.How can pests with different colours from plants keep out of danger?

A. They run away quickly.

B. Their colours are much like their enemies.

C. They hide themselves in the day and appear at night.

D. They have to move quietly.

3.Bears and lions can keep safe because they       .

A. have the colours much like the trees

B. move quickly

C. like brown and grey colours

D. live in forests

4.The kind of fish can live up to now because        .

A. it is very big and strong

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

C. the liquid it sends out can kill its enemies

D. it swims faster than any other fish

5.Which is the best title for this passage?

A. The Change of Colours for Animals and Pests

B. Colours of Different Animals and Pests

C. The Main Use of Colours for Animals and Pests

D. Some Animals and Pests

Answer

1.D

2.C

3.A

4.B

5.C

【解析】

试题分析：此篇文章介绍的是动物和害虫自身颜色的主要作用。

1.1】D细节理解题。根据Some birds like eating locusts，but birds cannot easily catch them. Why? It is because locusts change their colours together with the change of the colours of crops.可知蝗虫通过改变自身的颜色来进行自我保护，故选D。

2.2】C细节理解题。根据Some other pests with different colours from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.可知一些害虫通过把自己白天藏起来，只在晚上出来而远离危险。故选C。

3.3】A细节理解题。根据Bears, lions and other animals move quietly through forests. They cannot be seen by hunters. This is because they have the colours much like the tree.可知狮子和熊因为有和树相似的颜色来维持自身安全。故选A。

4.B细节理解题。根据A kind of fish in the sea can send out a kind of very black liquid when it faces danger. While the liquid spread over, the enemies cannot find it.可知一种鱼能生活到现在，因为这种鱼在面临危险的时候，能够发出一种黑色的液体，这种液体能够叫敌人看不到它们。故选B。

5.C综合理解题。本文主要介绍的是动物和害虫颜色的主要作用。故选C。

考点：考查社会现象类短文阅读。