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  3. 根据以下材料回答问题： As I wake up every day，I find it so hard to get out of bed as I think to myself．I would give anything just to s

根据以下材料回答问题： As I wake up every day，I find it so hard to get out of bed as I think to myself．I would give anything just to s

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问题 根据以下材料回答问题：
    As I wake up every day，I find it so hard to get out of bed as I think to myself．I would give anything just  to sleep a little longer．I know for a fact that I am not the only teenager，according to the Washington Post．Teenagers are getting far less sleep than they need，and their health，behavior and academic performance are suffering as a result．
    Based in part on Dr．Mary Carskadon’s research，some U．S．schools have changed their school’s start  time．Most of these schools are moving their starting times back to times around 9：00 a．m．Because it makes it easier for the students to learn and pay attention in class．Guajome Park Academy high school starts at  7：45 a．m．in the morning．From 7：45 to about 9：00 is when I have math and／or German depending on the day•In the time span of these classes some people will experience tiredness，irritability，edginess，and problems with memory，says Dr．Lindsley．Parent News says that 20％of all  high school students fall asleep in school during this time．
  The majority of teenagers need 9 to 10 hours of sleep a day．If you are a student at Guajome Park Academy you need to go to bed at 9：00 P．m．and wake up at 6：00 a．m．to get a good nine hours of sleep every day．Even if they go to bed at 9：00．they are not likely to fall asleep till after 11：00 so that leaves them with even less sleep．But most adolescents are talking on the telephone，watching late—night TV．They have a big test tomorrow．0r have too much homework to do and not enough to do it before bedtime since he or she didn’t get  back from the movies or where they were until next 7：00 a．m．
Which of the following statements is true according to the passage(    )
选项 A、20％ of all high school students fall asleep in school during school time
B、Most students go to bed at 9：00 P．m．and wake up at 6：00am．to get a good nine hours of sleep
C、People are likely to fall asleep before 11：00 in the evening
D、Most high school students need at least 9 hours of sleep a day
答案D
解析 根据第二段最后一句，20％的高中生在早上7：45至9：00之间容易瞌睡，而不是在校时间都容易瞌睡，排除A项。文章最后一段提到，要想保证9小时的睡眠，学生需要在晚上9点上床睡觉，早上6点起，但大多数学生在就寝后并没有立即入睡，故排除B项。根据第三段倒数第三句，学生就算9点睡觉，但11点之前还是很难睡着的，故C项错。根据第三段第一句可知，D项正确。
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