Weknowthatmanyanimalsdonotstayinoneplace.Birds,fishand...

问题详情：

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 birthplace in fresh water . Then it gives birth and dies . 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 the 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 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 .

12. 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

13. The fish called “ salmon ” spends a long time in __________ .

   A. salt water                   B. rivers                C. fresh water               D. its birthplace

14. The lobsters move __________ .

   A. to the fresh water                                          B. at a certain time

   C. to the undersea                                       D. to find more food

15. What is the main idea of the passage ?

   A. Animals move to find food more easily .

   B. Cold weather makes animals move to warmer places .

   C. Living things like to travel.

   D. Living things move from one place to another for different reasons .

【回答】

CABD

知识点：阅读理解

题型：阅读理解