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?

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?

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

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

4.What is this passage mainly about?

Health is very important. How can we stay healthy? Look at the three children. They'll tell you what helps them stay healthy.

    Xiao Ping: Well, I like eating vegetables and fruit. I never eat unhealthy snacks（快餐）. I drink a glass of milk before I go to bed and I get up on time every morning, I also join a dance club. I practice dancing a lot after school. My good lifestyle helps me keep healthy.

    Katrina: My room helps me stay healthy. She always makes me go to bed early on weekdays. She tells me not to eat too much junk food. My morn also gives mc a lot of work around the house. Sometimes I don't like that, but I do it all. This work keeps me busy, and it is like exercise. And I like any kind of exercise.

    Zhao Gang: Well, I like sports. I go swimming in summer and running or skating in winter. I don't watch TV too much, but I read a lot of books. I learn a lot from the books. I also drink a lot of milk and eat lots of fruit. They help me become strong and keep me healthy and happy.

（   ）1．What's the passage about?

A．How to eat things every day.                B．How to keep healthy.

      C．How to exercise every day.                  D．How to study well.

（   ）2．Xiao Ping ________.

A．eats a lot of snacks every week       B．drinks some milk for breakfast every day

      C．gets up late every morning               D．practices dancing a lot after school

（   ）3．Katrina's morn helps her ________.

      A．study hard                                 B．eat lots If junk food

      C．work around the house                    D．have a good lifestyle

（   ）4．ZhaoGang gets a lot of knowledge （知识） by_______.

      A．doing sports                              B．watching TV

      C．reading books                            D．listening to the radio