阅读表达
It is well-known that many animals do not stay in one place. Birds, fish and other animals move from one place to another at certain times. 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 is probably the migration of the fish, which is called “salmon”. This kind of fish is born in fresh water but it travels far to salt water. There it spends its life. When it is old, it returns to its birthplace in fresh water.
In northern Europe, there is a kind of mouse. They leave their mountain homes when their homes become 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 lobsters get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this and 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 traveling.
66. What does the passage mainly talk about? (No more than 10 words)
67. Where does the salmon spend its life? (No more than 5 words)
68. What’s the meaning of the underlined word “migration” in paragraph 2? (No more than 10 words)
69. When will the mice in northern Europe leave their mountain homes? (No more than 5 words)
70. What do you think of some animals’ migration? (No more than 30 words)
