During the day, you spend a lot of time running, jumping, laughing, eating, and talking. You use up a lot of energy(能量) , and by the end of the day you’re tired. Sleep gives your body a chance to rest.
But your brain (大脑)and body are not completely at rest during sleep. While you sleep, your mind may think of the things that happened during the day. It keeps the important things in mind as memories(记忆). It also thinks about things you were worrying about, and you may wake up with answers to some of your problems.
You also grow while you sleep. The thing called "human growth hormone (荷尔蒙)" in the body helps you grow during sleep. This growth hormone also helps the body to repair itself.
Sleep helps your body to conserve energy too. You use up a lot of energy during your daily activities. But when you sleep, your body temperature falls, and your "metabolism" (新陈代谢) slows down. You are still using some energy, but much less than when you are awake and active.
Have you ever stayed up past your bedtime? Did you have difficulty getting up the next morning? Maybe you had problems seeing clearly or you cannot think clearly. That was your body’s way of saying, "I need sleep！" A lack ( 缺乏) of sleep can stop your body and mind from working correctly.
【小题1】What does "human growth hormone" do while people sleep?

A．It helps people rest well.	B．It helps repair the body.
C．It helps answer problems.	D．It helps slow the body down.

【小题2】According to the passage, which of the following tells you need sleep?

A．You use up a lot of energy.	B．You enjoy daily activities.
C．Your body temperature falls.	D．You don’t want to get up.

【小题3】What does the underlined word "conserve" mean?

A．provide

B．move

C．save

D．spend

【小题4】What is this passage mainly about?

A．Sleep is very important.	B．The brain needs enough sleep.
C．Good ways to sleep well.	D．People use energy when sleeping

During the day, you spend a lot of time running, jumping, laughing, eating, and talking. You use up a lot of energy(能量) , and by the end of the day you're tired. Sleep gives your body a chance to rest.

But your brain (大脑)and body are not completely at rest during sleep. While you sleep, your mind may think of the things that happened during the day. It keeps the important things in mind as memories(记忆). It also thinks about things you were worrying about, and you may wake up with answers to some of your problems.

You also grow while you sleep. The thing called "human growth hormone (荷尔蒙)" in the body helps you grow during sleep. This growth hormone also helps the body to repair itself.

Sleep helps your body to conserve energy too. You use up a lot of energy during your daily activities. But when you sleep, your body temperature falls, and your "metabolism" (新陈代谢) slows down. You are still using some energy, but much less than when you are awake and active.

Have you ever stayed up past your bedtime? Did you have difficulty getting up the next morning? Maybe you had problems seeing clearly or you cannot think clearly. That was your body's way of saying, "I need sleep！" A lack ( 缺乏) of sleep can stop your body and mind from working correctly.

1.What does "human growth hormone" do while people sleep?

A．It helps people rest well.	B．It helps repair the body.
C．It helps answer problems.	D．It helps slow the body down.

2.According to the passage, which of the following tells you need sleep?

A．You use up a lot of energy.	B．You enjoy daily activities.
C．Your body temperature falls.	D．You don't want to get up.

3.What does the underlined word "conserve" mean?

A．provide

B．move

C．save

D．spend

4.What is this passage mainly about?

A．Sleep is very important.	B．The brain needs enough sleep.
C．Good ways to sleep well.	D．People use energy when sleeping

 

During the day, you spend a lot of time running, jumping, laughing, eating, and talking. You use up a lot of energy(能量) , and by the end of the day you're tired. Sleep gives your body a chance to rest.
But your brain (大脑)and body are not completely at rest during sleep. While you sleep, your mind may think of the things that happened during the day. It keeps the important things in mind as memories(记忆). It also thinks about things you were worrying about, and you may wake up with answers to some of your problems.
You also grow while you sleep. The thing called "human growth hormone (荷尔蒙)" in the body helps you grow during sleep. This growth hormone also helps the body to repair itself.
Sleep helps your body to conserve energy too. You use up a lot of energy during your daily activities. But when you sleep, your body temperature falls, and your "metabolism" (新陈代谢) slows down. You are still using some energy, but much less than when you are awake and active.
Have you ever stayed up past your bedtime? Did you have difficulty getting up the next morning? Maybe you had problems seeing clearly or you cannot think clearly. That was your body's way of saying, "I need sleep！" A lack ( 缺乏) of sleep can stop your body and mind from working correctly.
【小题1】What does "human growth hormone" do while people sleep?

A．It helps people rest well.	B．It helps repair the body.
C．It helps answer problems.	D．It helps slow the body down.

【小题2】According to the passage, which of the following tells you need sleep?

A．You use up a lot of energy.	B．You enjoy daily activities.
C．Your body temperature falls.	D．You don't want to get up.

【小题3】What does the underlined word "conserve" mean?

A．provide

B．move

C．save

D．spend

【小题4】What is this passage mainly about?

A．Sleep is very important.	B．The brain needs enough sleep.
C．Good ways to sleep well.	D．People use energy when sleeping

　　There were no speed limits (车速限制) when the first roads were built in the U. S. Then the number of cars grew. It was safer to have all the cars riding at about the same speed. That is why speed limits were made.

　　Before 1973, the speed limit on most big roads was 65 miles an hour. Suddenly, the gas supply began to drop. Saving gas became important. One answer was to make a new speed limit of 55 miles an hour.

　　Fast speeds use up a lot of gas. The new speed limit has saved about three million gallons (加仑，一种容量单位) of gas a day. It has also saved a lot of lives. About 9000 lives are saved each year. The lower speed gives cars more time to stop.

　　Some drivers don't pay attention to the speed limit. Drivers in western states think they should be allowed to drive faster. Their roads are flat (平坦的) and straight. Many truck drivers don't like the new speed limit either. They say their trucks run better at 65 miles an hour.

1．The first roads had no ________ .

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2．Before 1973, the speed limit was ________ .

[　　]

3．A new speed limit of 55 miles an hour was supposed to ________ .

[　　]

4．How many lives have been saved each year since 1973?

[　　]

5．Roads in western states are ________ .

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