Questionsrefer to the following article. We know that many animals do-考呗网

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单选题Questionsrefer to the following article.
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 place 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 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 cold, 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.Every year, when theseason of bad weather arrives, the lobsters get into a long time and start to walk across the floor ofthe 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 to travel.
The majority of animals migrate for__________.

A．place
B．safety
C．food
D．warmth

参考答案：C进入在线模考

根据“most of them move to find food more easily”可知，动物的迁徙主要是为了寻找食物。

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1 Salmon is known as a creature spending most of its life in__________.

A．warm water
B．fresh water
C．cold water
D．salt water

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2 Mice in northern Europe go away from homes when__________.

A．they are short of food
B．there is not enough space
C．it's getting warmer in the low land
D．it's getting colder in the mountains

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3 The reason why the lobsters migrate is__________.

A．the bad weather
B．the depth of the ocean
C．scientists' lack of interest
D．unknown

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