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

    If you want to become a fluent(流利的)English speaker you should take some advice: There are four skills in learning English. They are reading, listening, speaking, and writing. The most important thing you must remember is that if you want to improve your speaking and writing skills you should first master the skills of reading and listening.

    Read as much as you can. But your reading must be active. It means that you must think about the meaning of the sentence, the meanings of the unfamiliar words, etc. There is no need for you to pay much attention to grammars or try to understand all the unfamiliar words you come across, but the fact that you see them for the first time and recognize them whenever you see them, for example in other passages or books, is enough. It would be better to prepare yourself a notebook so you can write down the important words or sentences in it_

    As for listening, there are two choices: besides reading, you can listen every day for about 30 minutes. You can only pay attention to your reading and become skillful at your reading, then you can catch up on your listening. Since you have lots of inputs in your mind, you can easily guess what the speaker is going to say. This never means that you should not practice listening.

    For listening you can listen to cartoons or some movies that are specially made for children.  Their languages are easy. Or if you are good at listening you can listen to VOA or BBC programs every day. Again the thing to remember is being active in listening and preferably taking some notes.

    If you follow these pieces of advice, your speaking and writing will improve automatically, and you can be sure that with a little effort they will become perfect.

46. According to the author, which should you improve first among the four skills?

    A. Reading and writing.                    B. Reading and listening.

    C. Writing and speaking.                         D. Speaking and listening.

47. The underlined phrase "come across" in Paragraph 2 can probably be replaced by "_______".

    A. meet by accident                                B. discover

    C. find on purpose                           D. look for

48. The author seems to agree with the view that_______.

    A. everyone should listen to VOA or BBC programs every day

    B. you needn't practice listening if you keep on reading every day

    C. being good at reading is helpful in improving your listening

    D. you should take notes of whatever you are hearing

49. The passage is mainly about how to_______.

    A. choose suitable listening materials

    B. deal with new words in reading

    C. read as many English books as possible

    D. become fluent in speaking and writing English

    People often fall ill because of me. However, they can hardly blame me; it is largely their own   36  . A tired person may get caught, especially when he goes to  37  places with polluted air.  A sudden change in  38  is another factor(因素).In hot summer, people turn on the air-conditioner(空调)as soon as they return home. They will catch a cold easily.

    My latest victim is an   39   Student. After school, he played football hard for two hours. Though he was   40   , he still went to the cinema. Then he got back home and took a cold shower immediately.

    I took this golden chance to attack him. He tried to get rid of me, but l was already reproducing deep in his throat(咽喉).He kept sneezing and his nose was running.   41   he put on some warm clothes, it didn't work because there were too many of us. Besides, his sore throat kept upsetting(使难过)him, and he developed a cough to force me and my family out, but  42   .

    The next day he couldn't go to school. He had lost his appetite(胃口)and was not as active as before. His mother made him orange juice every few hours for more vitamin C, which would help his recovery(恢复)．

    For two days he was  43  by his mother. As he rested more, his defense(防御)strengthened and I began to feel the pressure. I knew I had to leave him before long. But I am not the one who gives up easily, and I   44   every effort to fight back. Unfortunately, it was my turn to feel disappointed now, for his defense system was starting an all-out   45   against me. I became weaker and finally my time was over.

    Do you know what I am?

36. A. business           B. responsibility          C. excuse                  D. fault

37. A. cleaned            B. crowded                C. controlled       D. covered

38. A. temperature      B. season                   C. place              D. condition

39. A. humorous        B. easy-going             C. energetic        D. selfish

40. A. excited             B. tired                      C. interested       D. worried

41. A. Since               B. Once                     C. Whether         D. Although

42. A. managed          B. failed                     C. refused          D. succeeded

43. A. looked             B. trained                   C. nursed                  D. avoided

44. A. tried                B. brought                 C. did                 D. paid

45. A. action              B. attraction               C. attention         D. attack

- What if I make a mistake when I give the piano performance?

-_______ and be confident

　 A. Never mind　 　　　　　　 B. Good luck　 　　　　 C. Be careful　 　 D. Take it easy

 The young man was charged with _______into several computer system last year..

    A. break                    B. to break                 C. breaking         D. broken

 You _______be hungry already-you had lunch only two hours ago!

    A. can't                     B. wouldn't                C. mustn't          D. needn't

 At the science museum, the students from Sunshine Middle School got to know_______.

    A. what does the spaceship look like                B. what the spaceship looks like

    C. How the spaceship looks like                      D. how does the spaceship look like

 Focus on your study, _______you will let your parents down.

    A. and                       B．if                         C．不填            D．or

 In a traditional Chinese wedding, the newly married couple are usually _______in red.

    A. worn                    B. had                       C. dressed          D. put

- Is _______here?

- No, Bob and Tim have asked for leave.

　 A. anybody　 　　　　　 B. everybody　 　　　　 C. somebody　 D. nobody