Like many other animals, swallows(燕子) will fly south when the days turn c___1____ and the l____2____ from trees begin to fall. They travel many miles to find a warmer winter. This k___3____ of travel is called migration (遷徙).

Birds are animals that like to migrate a lot when it is cold. About 600 out of 9,000 kinds of birds do it. They leave in a____4____ and come back during the w____5____ spring months.

     Many b___6____ don’t like the cold. They need food, but plants die and insects (昆蟲) hide in w____7____. So, they’ll only come home the next year, when there will be plenty of food for them to eat.

But the trip i____8___ often hard and not safe. Many birds fly in groups and make noises. Cranes (鶴) fly in groups l___9___ the letter V, or in a row. Others travel in pairs or a____10____.

1. ________   2.________    3.________    4.________    5.________

6. ________   7.________    8.________    9.________    10.________

Animals do many different, amazing things to get through the winter. Some of them migrate. They travel to other places where the weather is warmer or where they can find food.

Many birds migrate in autumn. Because the trip can be dangerous, some travel in large groups. For example, geese(鵝) fly in noisy, “V”-shaped groups. Other kinds of birds fly alone.

Some animals stay active in winter. They must change themselves as the weather changes. Many change their doing or their bodies. For example, snowshoe rabbits grow white fur to help them hide in the snow.

Food is hard to find in winter. Some animals, like mice, collect lots of food in autumn and store it to eat later. Some animals eat different kinds of food as the seasons change.

Some animals hibernate for part or all of the winter. This is a special, very deep sleep. The animal’s body temperature drops, and its heartbeat and breathing slow down. It uses very little energy. In autumn, these animals get ready for winter by eating much more food than in summer and storing it as body fat. They use this fat to keep them alive while hibernating.

Water makes good protection for many animals. When the weather gets cold, they move to the bottom of lakes and rivers. There, frogs and many fish hide under rocks or fallen leaves. Cold water holds more oxygen than warm water, and frogs can breathe through their skin.

Every type of insect has its own life cycle and that is the way it grows and changes. Different insects spend the winter in different forms of their lives. Some insects also spend the winter without moving. Some insects spend the winter as pupae（蛹）. Other insects die after laying eggs in autumn. The eggs change into new insects in spring and everything begins all over again.

1  What does the underlined word “migrate” in the first paragraph most probably mean ?

A. move from one place to another                  B. sleep in the winter  

C. disappear                                    D. look for food

2  Why do many birds fly in large groups?

A. They can easily find food this way.       B. There may be danger during the trip.

C. They can get warm at night.             D. They will use little energy.

3  Snowshoe rabbits spend the cold winter by __________.

A. breathing through their skin              B. eating a lot of food

C. sleeping for the whole winter            D. growing white thicker fur

4 The main purpose of the examples in the last paragraph is to tell us ________.

A. most insects die when winter comes

B. different insects grow and change in their own ways

C. most insects spend the winter without moving           

D. different insects grow and change in the same ways

5  What is the passage mainly about?

A. How living things grow and change in the winter.

B. How living things spend the winter.

C. How living things get food in the winter.

D. How living things travel in the winter.