Question

We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily, but others move to get away from places that are too crowded.

When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration(迁移) is probably the migration of the fish, which is called “salmon”. This fish is born in fresh water but it travels many miles to salt water. There it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies there. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.

Recently, scientists have studied the migration of a kind of lobster(龙虾). Every year, when the season of bad weather arrives, the lobster get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go.

So, sometimes we know why humans and animals move from one place to another, but at other times we don’t. Maybe living things just like travel.

1.Most animals move from one place to another at a certain time to _____.

A. give birth    B. enjoy warmer weather

C. find food more easily    D. find beautiful places

2.The mice in northern Europe move when _____.

A. they need fresh water    B. the weather is bad

C. the place gets too crowded    D. they haven’t enough food

3.This passage is mainly about _____.

A. why animals move from one place to another    B. how animals can find food easily

C. new discoveries of animals traveling    D. some problems with traveling

Answer

1.C

2.C

3.A

【解析】

本文是一篇说明文，每年都有很多动物从一个地方迁移到另外一个地方，文章介绍了动物迁徙的原因并列举了多个具体的例子加以说明。

1.细节理解题。根据第一段第三句They move for different reasons: most of them move to find food more easily可知大部分动物迁移是为了更容易找到食物。故C项正确。

2.细节理解题。根据第二段倒数34句In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded.可知北欧这种老鼠迁移是因为原来的地方太拥挤了。故C项正确。

3.主旨大意题。本文是一篇说明文，每年都有很多动物从一个地方迁移到另外一个地方，文章介绍了动物迁徙的原因并列举了多个具体的例子加以说明。故A项是文章的中心思想，BCD与文章内容无关。