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共60小题，约9100字。

　　中考阅读理解实战演练之缤纷自然篇
　　第3章  实战演练
　　阅读理解材料浩如烟海，中考英语复习，时间短，任务重。为了能让同学们脱离题海，更加省时省力地提高自己的阅读理解能力，我们特意选编了一些题材新颖、质量上乘的阅读材料。这些材料内容丰富，趣味性强，无论是在设计上，还是在难度上，都与中考英语试题相当。“会当凌绝顶，一览众山小”。完成这些短文及题目之后，再做中考阅读理解题，就一定能驾轻就熟，游刃有余。
　　Section I 缤纷自然篇
　　Passage 1
　　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 (近来), 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.
　　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 fish called “salmon” spends a long time in ______.
　　A. salt water B. rivers C. fresh water D. its birthplace
　　3.The mice in northern Europe move when _______.
　　A. they give birth B. the place gets too crowded
　　C. the weather is bad D. they haven’t enough food
　　4.The lobsters move ________.
　　A. to the fresh water B. at a certain time C. to the undersea D. to find more food
　　5.What is the main idea of the passage?
　　A.Animals move 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.
　　Passage 2
　　If you look at the sky one night and see something moving and shining that you have never seen before, it might be a comet (彗星).
　　A comet sometimes looks like a star. Like a planet, a comet has no light of its own. It shines from the sunlight it reflects (反射). Like the earth, a comet goes round the sun, but on a much longer path (轨道) than the earth travels.
　　If a comet isn’t a star, what is it then?
　　Some scientists think that a large part of a comet is water frozen into pieces of ice and mixed with iron and rocst and perhaps a few big pieces of rock. When sunshine