Sleep is like a school day : it's divided into different periods ,or stages . When you are awake , your brain waves fire rapidly . As you begin to relax and drift into the first stage of sleep , your brain produces slower-moving waves and you lose awareness of your surroundings . As you slide to deeper sleep , your body repairs itself from the normal wear and tear of daily life . Then , as you begin to drift back up to a lighter sleep , your mind becomes more alert （机警）, 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 your lids (眼皮), as though you were watching a movie . During other stages , you might move in bed , but during REM sleep you're still . That's probably because if you cold move , your body would act out your dreams . As you get close to morning , you spend more time in REM than in deep sleep , so you dream more . Researchers know that during REM sleep the part of the brain that handles learning and thinking is very active .
Getting too little sleep can affect you personality . Experts recommend that children get at least nine hours sleep a night .
56．What does the word recommend in the last paragraph mean ?
A．suggest B．ask C．wish D．order
57．Sleep has many advantages except .
A．improving your mood B．making you strong
C．helping you study D．practising your eyes
58．During your sleep , .
①your body repairs itself from the normal wear and tear of daily life
②your brain produces slower-moving waves
③your dream begins
④you lose awareness of surroundings
Choose the right order :
A．①③②④ B．②④①③ C．④①③② D．④③①②
59．Suppose this is the course of your sleep , in which part of the course do you have more dreams ?
A．Light sleep . B．Deep sleep .
C．REM sleep . D．The first two stages of sleep .
60．Which of the following is not right ?
A．Hormone has something to do with your growth .
B．You don't move while you are in REM sleep , dreaming .
C．The closer to morning , the more dreams you have .
D．The whole brain is active
(B)
There are some very good things about open education . This way of teaching allows the students to grow as people , and develop their own interests in many subjects . Open education allows students to be responsible for their own education , as they are responsible for what they do in life . Some students do badly in a traditional classroom . The open classroom may allow them to enjoy learning . Some students will be happier in an open education school . They will not have to worry about grades or rules . For students who worry about these things a lot , it is a good idea to be in an open classroom .
But many students will not do well in an open classroom . For some students , there are too few rules . These students will do little in school . They will not make good use of open education . Because open education is so different from traditional education , these students may have a problem getting used to making so many choices . For many students it is important to have some rules in the classroom . They worry about the rules even when there are no rules .Even a few rules will help this kind of students . The last point about open education is that some traditional teachers do not like it . Many teachers do not believe in open education . Teachers who want to have an open classroom may have many problems at their schools .
