Going to sleep may seem quite boring compared with all the fun things you do while you are awake, but there's a lot going on in your mind and body while you are sleeping.

Sleep, in fact, is as important to your survival（生存） as eating and drinking. Sleep improves your mood, makes you a better athlete and helps you remember and understand what you learned during the day. While you sleep, your body temperature drops. Your heart beats more slowly, A chemical that controls growth, which is called a hormone(荷尔蒙),moves into your bloodstream. Scientists think that sleep brings back energy and improves your immune (免疫)system.

Sleep is like a school day: it's divided into different stages. When you are awake, your brain waves move quickly. As you begin to relax and fall into the first stage of sleep, your brain produces slower-moving waves and you lose awareness (意识) of your surroundings（环境）．As you fall into deeper sleep, your body repairs itself from the normal wear and tear of daily life. Then, as you begin to drift back into a lighter sleep, your mind becomes more alert(警觉的), and your dreams begin. You are in REM sleep.

REM is the name for the rapid eye movement that happens while you are dreaming. During REM sleep, your eyes move back and forth behind, as though you were watching a movie.

During other stages of sleep, you might move in bed, but during REM sleep you're not making any movement, That's probably because if you could move, your body would act out your dreams. As you get closer to waking up in the morning, you spend more time in REM sleep than in deep sleep, so you dream more. Researchers know that during REM sleep the part of the brain that deals with learning and thinking is very active.

Getting too little sleep can affect your personality. Experts recommend that children get at least nine hours of sleep a night.

50. Which is the right order during your sleep?

　 ① your body repairs itself from the normal wear and tear of daily life

　 ② your brain produces slower-moving waves

　 ③ your dreams begin

　 ④ you lose awareness of your surroundings

　 A.①③②④　　　　 B.②④①③　　　 C.④①③②　　　　 D.②④③①

51. In which of the stage/stages of sleep do you have the most dreams?

　　 A. Light sleep. B. Deep sleep.

C. REM sleep.　 　　　　　　　　　　　　 D. The first two stages of sleep.

52. Which of the following is NOT true?

　　 A. You don't move while you are dreaming in REM sleep.

　　 B. During REM sleep, the whole brain is active.

　　 C. The closer to waking in the morning, the more dreams you have.

　　 D. Hormones have something to do with your growth.

53. According to the scientists and experts, _______.

A. adults get at least nine hours of sleep a night

　　 B. there's nothing going on in your mind while you're sleeping

　　 C. sleep have little impact(影响) on our personality

　　 D. sleep can make us energetic and healthy

Going to sleep may seem quite boring compared with all the fun things you do while you are awake, but there's a lot going on in your mind and body while you are sleeping.

Sleep, in fact, is as important to your survival（生存） as eating and drinking. Sleep improves your mood, makes you a better athlete and helps you remember and understand what you learned during the day. While you sleep, your body temperature drops. Your heart beats more slowly, A chemical that controls growth, which is called a hormone(荷尔蒙),moves into your bloodstream. Scientists think that sleep brings back energy and improves your immune (免疫)system.

Sleep is like a school day: it's divided into different stages. When you are awake, your brain waves move quickly. As you begin to relax and fall into the first stage of sleep, your brain produces slower-moving waves and you lose awareness (意识) of your surroundings（环境）．As you fall into deeper sleep, your body repairs itself from the normal wear and tear of daily life. Then, as you begin to drift back into a lighter sleep, your mind becomes more alert(警觉的), and your dreams begin. You are in REM sleep.

REM is the name for the rapid eye movement that happens while you are dreaming. During REM sleep, your eyes move back and forth behind, as though you were watching a movie.

During other stages of sleep, you might move in bed, but during REM sleep you're not making any movement, That's probably because if you could move, your body would act out your dreams. As you get closer to waking up in the morning, you spend more time in REM sleep than in deep sleep, so you dream more. Researchers know that during REM sleep the part of the brain that deals with learning and thinking is very active.

Getting too little sleep can affect your personality. Experts recommend that children get at least nine hours of sleep a night.

50. Which is the right order during your sleep?

　 ① your body repairs itself from the normal wear and tear of daily life

　 ② your brain produces slower-moving waves

　 ③ your dreams begin

　 ④ you lose awareness of your surroundings

　 A.①③②④　　　　 B.②④①③　　　 C.④①③②　　　　 D.②④③①

51. In which of the stage/stages of sleep do you have the most dreams?

　　 A. Light sleep. B. Deep sleep.

C. REM sleep. 　　　　　　　　　　　　　 D. The first two stages of sleep.

52. Which of the following is NOT true?

　　 A. You don't move while you are dreaming in REM sleep.

　　 B. During REM sleep, the whole brain is active.

　　 C. The closer to waking in the morning, the more dreams you have.

　　 D. Hormones have something to do with your growth.

53. According to the scientists and experts, _______.

A. adults get at least nine hours of sleep a night

　　 B. there's nothing going on in your mind while you're sleeping

　　 C. sleep have little impact(影响) on our personality

　　 D. sleep can make us energetic and healthy

①The Dream It is everyone’s dream to work at home or not work at all．You can plan your own hours and work when you want to．There is no more rush hour and no hours that people waste when they get to and from a job every day．
②The Fact The fact is that this dream can be attained．You can stay at home，work when you want to and make money when you need to．There are plenty of opportunities for you to make money at home，just by using your computer and the Internet．
③Start Today! Educate yourself，look closely into all the opportunities and decide on what works best for you．It will not happen during one night，but you can make the decision today and start to make it happen today．
④How Could You Do It? Do you have a blog（博客）or a personal website like millions of other people?  Are you using it to make money? Most of these blog and website owners are not．But you can do that!
⑤          When you have your computer and the Internet working for you，your businesses will be working for you 24 hours a day，seven days a week．You will make money while you sleep，travel or do whatever you want to do all day long．
⑥Get Going! There are many ways you can make money with your computer．And you can begin your stay – at – home businesses with just a little money．What are you waiting for ?
【小题1】In which part of a newspaper would you most probably read this passage?

①The Dream It is everyone’s dream to work at home or not work at all．You can plan your own hours and work when you want to．There is no more rush hour and no hours that people waste when they get to and from a job every day．
②The Fact The fact is that this dream can be attained．You can stay at home，work when you want to  and make money when you need to．There are plenty of opportunities for you to make money at home，just by using your computer and the Internet．
③Start Today! Educate yourself，look closely into all the opportunities and decide on what works best for you．It will not happen during one night，but you can make the decision today and start to make it happen today．
④How Could You Do It? Do you have a blog（博客）or a personal website like millions of other people?  Are you using it to make money? Most of these blog and website owners are not．But you can do that!
⑤          When you have your computer and the Internet working for you，your businesses will be working for you 24 hours a day，seven days a week．You will make money while you sleep，travel or do whatever you want to do all day long．
⑥Get Going! There are many ways you can make money with your computer．And you can begin your Stay-at -home businesses with just a little money．What are you waiting for?
【小题1】In which part of a newspaper would you most probably read this passage?