---Don’t _______too late, or you will feel tired in class．

---I won’t, Mum．Good night!

A．wake up           B．get up           C．stand up           D．stay up

Sleep is something we all do. But some people need to sleep more than others. Babies sleep most of the time. Children in school sleep about ten to twelve hours a night. Most grown-ups sleep only seven or eight hours.      

All parts of our bodies have to rest after they work. Our arms need a rest after we lift heavy things. When we run fast, our legs work hard. They get tired. We have to rest them. Our brains work hard, too.     72      We can sit quite still and rest our arms and legs. But our brains aren’t resting. They go right on thinking as long as we are awake.

Our brains slow down a bit when we sleep and dream.    Instead of thinking wide-awake thought, our brains make up dreams. Some dreams are very pleasing. Some are not. Most of the time we forget them when we wake up.

Scientists have tried to find out what would happen if people were not allowed to sleep. They asked some people not to go to bed. The people stayed up all night and all the next day. They stayed up the next night, too and the day after. They played games. But they made mistakes. They forgot things.      . The people grew rude and mean. They became angry with their friends. Finally they were too tired to stand up. The moment they sat down, they fell asleep.

Scientists found that if people are not allowed to sleep, they act in an unusual way.

        But we do know that we need it to stay well.

So tonight have a good sleep. Lie down under the covers. Shut your eyes. Let your thoughts travel about. Soon you’ll stop thinking. You’ll be asleep.

A. But even as we sleep our brains are doing some work.

B. It was hard for their tired brains to work.

C. When we are awake, they help us pay attention to the world around us.

D. No one knows quite surely why sleep is so good for us.

E. Good sleep helps to improve one’s memory.

F. But babies, children and grown-ups ----all of us need to have our sleep.

Sleep is something we all do. But some people need to sleep more than others. Babies sleep most of the time. Children in school sleep about ten to twelve hours a night. Most grown-ups sleep only seven or eight hours.      1.

All parts of our bodies have to rest after they work. Our arms need a rest after we lift heavy things. When we run fast, our legs work hard. They get tired. We have to rest them. Our brains work hard, too.     2.72      We can sit quite still and rest our arms and legs. But our brains aren’t resting. They go right on thinking as long as we are awake.

Our brains slow down a bit when we sleep and dream.  3.   Instead of thinking wide-awake thought, our brains make up dreams. Some dreams are very pleasing. Some are not. Most of the time we forget them when we wake up.

Scientists have tried to find out what would happen if people were not allowed to sleep. They asked some people not to go to bed. The people stayed up all night and all the next day. They stayed up the next night, too and the day after. They played games. But they made mistakes. They forgot things.    4.  . The people grew rude and mean. They became angry with their friends. Finally they were too tired to stand up. The moment they sat down, they fell asleep.

Scientists found that if people are not allowed to sleep, they act in an unusual way.

    5.    But we do know that we need it to stay well.

So tonight have a good sleep. Lie down under the covers. Shut your eyes. Let your thoughts travel about. Soon you’ll stop thinking. You’ll be asleep.

A. But even as we sleep our brains are doing some work.

B. It was hard for their tired brains to work.

C. When we are awake, they help us pay attention to the world around us.

D. No one knows quite surely why sleep is so good for us.

E. Good sleep helps to improve one’s memory.

F. But babies, children and grown-ups ----all of us need to have our sleep.

Sleep is something we all do. But some people need to sleep more than others. Babies sleep most of the time. Children in school sleep about ten to twelve hours a night. Most adults sleep only seven or eight hours. __1___

All parts of our bodies have to rest after they work. Our arms need a rest after we lift heavy things. When we run fast, our legs work hare. They get tried. We have to rest them. Our brains work hard, too. __2__ We can sit quite still and rest our arms and legs. But our brains aren’t resting. They go right on thinking as long as we are awake.

Our brains slow down a bit when we sleep and dream. __3__ Instead of thinking wide—awake thoughts, our brains make up dreams. Some dreams are very pleasing. Some are not. Most of the time we forget them when we wake up.

Scientists have tried to find out what would happen if people were not allowed to sleep. They asked some people not to go to bed. The people stayed up all night and all the next day. They stayed up the next night too, and the day after. They played games, but they made mistakes. They forgot things. __4__

The people grew rude and mean. They became angry with t heir friends. Finally they were too tired to stand up. W hen they sat down, they fell asleep.

Scientists have found that if people are not allowed to sleep and to dream, they act in an unusual way.

__5__ But we do know that we need it to stay well. So tonight have a good sleep. Lie down under the covers. Shut your eyes. Let your thoughts wander. Soon you’ll stop thinking. You’ll be asleep.

A. It was hard for their tired brains to work.

B. When we are awake, they help us pay attention to the world around us.

C. But babies, children, and adults—all of us need to have our sleep.

D. Good sleep helps to improve one’s memory.

E. No one knows why sleep is so good for us.

F. But even as we sleep our brains are doing some work.

G. Of course you will have a good sleep.

完形填空(Cloze Test)

阅读下面短文，掌握其大意，然后从各题所给的四个选项（A、B、C和D）中，选出最佳选项。

　　As Christmas is coming, there are presents to be bought, cards to be sent, and rooms to be cleaned. Parents are trying to hide presents from curious young children. If the gifts are large, this is sometimes a real ___1___ On Christmas Eve, young children find the excitement almost unbearable （不能忍受的）. They are torn between the wish to go to bed early so that Father Christmas will bring their presents quickly and the wish to ___2___ late so that they will not ___3___ the fun. The wish for gifts usually proves stronger. But though children go to bed early, they often lie ___4___ for a long time, hoping to see Father Christmas.

　　Last Christmas, my wife and I ___5___ hid a few large presents in the storeroom. I ___6___ the moment when my son, Jimmy, would ask me where that new bike had come from, but ___7___ he did not see it.

　　On Christmas Eve, ___8___ took the children hours to go to sleep. It must have been nearly ___9___ when my wife and I went quietly into their room and began ___10___ stockings. Then I pushed in the ___11___ I bought for Jimmy and left it beside the Christmas tree. We knew we would not get much sleep that night, for the children were ___12___ to get up early. At about five o'clock the next morning, we were ___13___ by loud sounds coming from the children's room. ___14___ I had time to get out of bed, young Jimmy came riding into the room on his new bike, and his sister, Mary, ___15___ close behind pushing her new baby carriage. Then came the baby, moving on his hands and knees with a large balloon behind him. Suddenly it burst. That woke us up completely. The day had really begun with a band （巨响）!