Are you tired？Do you often catch colds and flu？If so，you might consider changing your sleep habits.Good health demands good sleep.Studies have shown that most people need eight hours of sleep each night.Americans，however, on average, get only seven hours.One­third of us get just six hours，and good health is not simply a matter of how much sleep you get，but also the type of sleep you get.

Non­rapid eye movement (NREM) sleep allows your body to grow and repair itself.During NREM sleep，your muscles relax.Your heart rate and breathing rate decrease.Your eyes roll slowly back and forths then they stop moving.Most of the sleeping you do is NREM sleep.

Rapid eye movement (REM) sleep restores your brain.During REM sleep，you dream.You may not remember every dream，but every time you sleep，you dream.Your eyes move back and forth quickly.Your breathing rate and heartbeat increase.Your muscles become paralysed (麻痹的)．About 25 percent of your sleep is REM sleep.You need enough of both kinds of sleep to be healthy.

Is it a real concern if you don’t get enough good sleep？It certainly is.Poor sleep puts you and others at risk.More than 100,000 car accidents are caused each year by drivers who nod off (打盹)．Almost $100 billion is lost yearly in the business and environmental field.People deprived_of sleep have been factors in the Challenger space tragedy，the Exxon Valdez oil spill (溢出)，and the Chernobyl nuclear reactor accident.So do yourself and everyone around you a favour.Don’t cheat yourself out of good sleep!

1. This passage is mainly about________.

A．why people dream

B．what happens during REM sleep

C．why people catch colds and flu

D．the importance of sleep

2．Most sleep at night is________.

A．NREM sleep

B．REM sleep

C．good quality sleep

D．sleep that makes you become paralysed

3．“Good sleep” can be described as________.

A．getting about eight hours of the two types of sleep

B．sleeping soundly through the night

C．getting more than seven hours of sleep each night

D．having sleep that prevents accidents

4．To help the readers understand the effects of poor sleep habits，the writer________.

A．explains the two types of sleep

B．compares the two kinds of sleep

C．mentions several disasters

D．explains all the risks

5．The underlined phrase “deprived of” in the last paragraph means “________”．

A．not wanting                                        B．stopped from having

C．trying to get                                        D．a(chǎn)sking for

During the day we work and play and at night we sleep. Our bodies rest while we sleep. In the morning we are ready to work and play again. It is while we are asleep that our bodies grow most. When children feel tired and angry, they usually need more sleep. We can get our lessons better, and we feel better, too, when we have had plenty of rest. Boys and girls, eight or nine years old, need ten hours of sleep every night. Our bodies need plenty of air when we sleep. If we do not get enough fresh air we wake up feeling tired. While in bed we must not cover our heads. If we do, our lungs （肺） will not get enough fresh air. If we open our windows at night we can have plenty of fresh air. Cool air is better than warm air. Boys and girls must get plenty of sleep if they want to grow and be strong.

1．Our bodies grow most while we are ________.

    A．eating              B．playing              C．sleeping            D．exercising

2．Which is the best air for us?

    A．Hot air.            B．Cool air.             C．Warm air.           D．Dry air.

3．What often makes us feel tired in the morning?

    A．Too much air.                             B．Not enough fresh air.

    C．Too much cold air.                         D．Too much sleep.

4．How can you get plenty of fresh air at night? You can______.

    A．open your windows                        B．not sleep in bed

    C．sleep ten hours                            D．go to bed late

5．The writer is trying to tell boys and girls ______.

      A．to get their lessons better                     B．not to cover their heads

C．how to go to bed                                          D．to get plenty of sleep

March 16 is World Sleep Day. This year’s slogan is “Breathe Easily, Sleep Well”. Its aim is to celebrate the *benefits of good and healthy sleep.
Fangfang, from Liaoning, just became a high school student last September. She gets up at 5:30 a.m. every day and goes to bed at about midnight. Fangfang feels sleepy all the time. “I want to finish all my homework first,” she said.
Sleep is like food for the brain. Enough sleep helps the body and brain grow and develop. According to the National Sleep *Foundation in the US, adults need seven to nine hours of sleep every night. For students who are 10 to 17 years old, a healthy amount is about eight to nine hours every night.
But many students don’t get enough sleep because of early school start time and heavy homework. About 80 percent of middle school students don’t get enough sleep, the China Youth and Children Research Center reported. For some students, they want to sleep early, but they keep worrying about their schoolwork and can’t fall asleep quickly. For others,they may even have insomnia, and usually they have to ask the doctors for help.
These sleeping problems greatly *affect people’s life. Some doctors found out that *lack of sleep for teenagers lead to poor grades. Students without enough sleep cannot pay attention in class or do well in sports. Also, they often become anxious easily.
Luckily, with good sleep habits, it is easier to fall asleep. Some of these good habits include *avoiding drinks that make people excited late in the day, going to sleep at the same time every night, and sleeping in a comfortable place that is dark, quiet, and neither too warm nor too cold.
More tips to get a good night’s sleep:
Exercising during the day. You’d better do sports three hours before going to bed.
Don’t eat big meals before bedtime. Drink a warm glass of milk.
If you stay awake worrying about things, try making a list of things that you need to do before you go to bed.
【小題1】How much sleep do students aged from 10 to 17 need every night? 

March 16 is World Sleep Day. This year’s slogan is “Breathe Easily, Sleep Well”. Its aim is to celebrate the *benefits of good and healthy sleep.
Fangfang, from Liaoning, just became a high school student last September. She gets up at 5:30 a.m. every day and goes to bed at about midnight. Fangfang feels sleepy all the time. “I want to finish all my homework first,” she said.
Sleep is like food for the brain. Enough sleep helps the body and brain grow and develop. According to the National Sleep *Foundation in the US, adults need seven to nine hours of sleep every night. For students who are 10 to 17 years old, a healthy amount is about eight to nine hours every night.
But many students don’t get enough sleep because of early school start time and heavy homework. About 80 percent of middle school students don’t get enough sleep, the China Youth and Children Research Center reported. For some students, they want to sleep early, but they keep worrying about their schoolwork and can’t fall asleep quickly. For others,they may even have insomnia, and usually they have to ask the doctors for help.
These sleeping problems greatly *affect people’s life. Some doctors found out that *lack of sleep for teenagers lead to poor grades. Students without enough sleep cannot pay attention in class or do well in sports. Also, they often become anxious easily.
Luckily, with good sleep habits, it is easier to fall asleep. Some of these good habits include *avoiding drinks that make people excited late in the day, going to sleep at the same time every night, and sleeping in a comfortable place that is dark, quiet, and neither too warm nor too cold.
More tips to get a good night’s sleep:
Exercising during the day. You’d better do sports three hours before going to bed.
Don’t eat big meals before bedtime. Drink a warm glass of milk.
If you stay awake worrying about things, try making a list of things that you need to do before you go to bed

1. 1.

   How much sleep do students aged from 10 to 17 need every night?

   1. A.
      7 hours
   2. B.
      8-9 hours
   3. C.
      10-12 hours
   4. D.
      Less than 7 hours
2. 2.

   What does the word “insomnia” mean in Paragraph 4?

   1. A.
      失眠癥
   2. B.
      好動癥
   3. C.
      咽喉炎
   4. D.
      關(guān)節(jié)炎
3. 3.

   If teenagers don’t get enough sleep, they may _____________

   1. A.
      do well in sports
   2. B.
      grow and develop better
   3. C.
      feel sleepy in class
   4. D.
      do much better in studies
4. 4.

   Which of the following is a good sleeping habit according to the passage?

   1. A.
      Do exercise at night before going to bed
   2. B.
      Going to sleep at the same time every night
   3. C.
      Going to sleep in a place where it is bright
   4. D.
      Eat big meals or drink a lot of wine at night
5. 5.

   What is the main idea of the passage?

   1. A.
      People should sleep well to live healthy and study better
   2. B.
      Teenagers should sleep longer on Saturdays and Sundays
   3. C.
      People should see the doctor if they don’t have enough sleep
   4. D.
      Teenagers don’t get enough sleep because of heavy homework

During the day we work and play and at night we sleep．Our bodies rest while we sleep．In the morning we are ready to work and play again．It is while we are asleep that our bodies grow most．When children feel tired and angry，they usually need more sleep．We can get our lessons better，and we feel better，too，when we have had plenty of rest．Boys and girls，eight or nine years old，need ten hours of sleep every night．Our bodies need plenty of air when we sleep．If we do not get enough fresh air we wake up feeling tired．While in bed we must not cover our heads．If we do，our lungs（肺）will not get enough flesh air．If we open our windows at night we can have plenty of flesh air．Cool air is better than warm air．Boys and gifts must get plenty of sleep if they want to grow and be strong．

（    ）1．Our bodies grow most while we are ________．

    A．eating                  B．playing                 C．sleeping          D．exercising

（    ）2．Which is the best air for us? __________air．

    A．Hot                     B．Cool                    C．Warm             D．Dry

（    ）3．What often makes us feel tired in the morning?

    A．Too much air．                                       B．Not enough fresh air．

    C．Too much cold air．                                   D．Too much sleep．

（    ）4．How call you get plenty of flesh air at night? You can __________．

    A．open your windows                                 B．not sleep in bed

    C．sleep ten hours                                          D．go to bed late

（    ）5．The writer is trying to tell boys and girls _________．

    A．to get their lessons better                          B．not to cover their heads

    C．how to go to bed                                       D．to get plenty of sleep