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 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 birth- place 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 ha
A. Animals move in order to find food more easily.
B. The migration of the fish called "salmon" is the most famous migration.
C. Living things move from one place to another because they like to travel.
D. Sometimes we know why and how living things move from one place to another, but sometimes we don’t.
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 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 birth- place 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 ha
A. give birth
B. enjoy warmer weather
C. find food more easily
D. find beautiful places
What should we do to stay healthy One important rule is (11) to exercise often.
The Fisher family try to exercise every day. Mr. Fisher cannot exercise in the morning because he must be (12) at his job at exactly seven o’clock. But he (13) runs every evening. He would rather run than watch TV. Walter exercises a lot too. He walks to school every day, and after school he plays (14) different sports with his friends. Mrs. Fisher goes to a yoga class (15) twice a week.
The Fishers all feel better now. And they believe you mustn’t be lazy. You don’t have to exercise every day. But you should try to get in shape and stay in shape.
What should we do to stay healthy
One important rule is（ ）.
我来回答:
