Do you know how much your children sleep?
According to the National Sleep Foundation, should sleep twelve to eighteen hours of every twenty-four. With a gradual to twelve to fourteen hours for toddlers(初学走路的孩子) one to three; eleven to thirteen hours for three to five; and ten to eleven hours for schoolchildren five to ten.
But things get really at adolescence. Not only do teenagers need more sleep than ---eight and a half to nine and a quarter hours a night, according to the sleep foundation - but the times which they get sleepy and are able to awaken and feel rested shift in a that does not match to the times at most schools.
Sleep studies have shown that the typical teenager does not fall asleep readily before 11 p. m. or later. many have to get up by 6 a. m. or to get to school for a class starts at 7:30 or 8 a.m. More than a few off during that class, and often the one as well. Even if awake, they're in no condition to learn much of anything.
In one study, more than 90 percent of teenagers they slept less than the nine hours a night, and 10 percent said they slept less than six hours.
_ James B. Maas, a Cornell University psychologist and Leading sleep researcher, has observed, most teenagers are walking zombies(僵尸) they get far too little sleep.
【小题1】A．childrenB．newbornsC．eldersD．youngsters【小题2】A．fromB．withC．outD．up【小题3】A．reductionB．increaseC．growthD．improvement【小题4】A．teenagersB．studentsC．babiesD．preschoolers【小题5】A．relatedB．separatedC．agedD．varied【小题6】A．demandingB．challengingC．satisfyingD．encouraging【小题7】A．adultsB．toddlersC．babies D．schoolchildren【小题8】A．inB．onC．atD．for【小题9】A．excitedlyB．earlyC．casuallyD．naturally【小题10】A．formB．meansC．methodD．way【小题11】A．endB．startC．holidayD．examination【小题12】A．SinceB．ForC．YetD．Then【小题13】A．nicerB．earlierC．cleanerD．better【小题14】A．thatB．itsC．whatD．whose【小题15】A．putB．takeC．dozeD．cut【小题16】A．nextB．otherC．lastD．new【小题17】A．examinedB．surveyedC．reportedD．convinced【小题18】A．regulatedB．remendedC．analyzedD．reported【小题19】A．LikeB．SinceC．AsD．Furthermore【小题20】A．becauseB．whichC．whileD．stillB
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(答案→)B
解析：文章介绍不同年龄阶段的人需要的睡眠时间不同，特别指出年轻人的睡眠严重不足。
【小题1】考查名词：A. children儿童，B. newborns新生儿，C. elders老年人，D. youngsters年轻人，从下文的：With a gradual 43 to twelve to fourteen hours for toddlers(初学走路的孩子) one to three; eleven to thirteen hours for 44 three to five;可知一开始是说新生儿，选B
【小题2】考查介词辨析：A. from来自，B. with和，C. out外面，D. up向上，新生儿在每天的24小时中应该睡12到18小时，out of…在…里面，选C
【小题3】考查名词：A. reduction减少，B. increase增加，C. growth增长，D. improvement提高，初学走路的孩子逐渐减少到12-14小时，选A
【小题4】考查名词：A. teenagers年轻人，B. students学生，C. babies婴儿，D. preschoolers学龄前儿童，从下文的：schoolchildren 45 five to ten.可知三到五岁的学龄前儿童是11-13小时，选D
【小题5】考查动词辨析：A. related联系，B. separated分离，C. aged年龄，D. varied不同，年龄在5-10岁的学生应该睡10-11小时。Aged做定语修饰schoolchildren，选C
【小题6】考查形容词辨析：A. demanding苛刻的，困难的，B. challenging有挑战的，C. satisfying令人满意的，D. encouraging令人鼓舞的，从下文的内容，可知对年轻人来说事情是有挑战的。
选B
【小题7】考查名词：A. adults成年人，B. toddlers学步的小孩，C. babies婴儿，D. schoolchildren学生，年轻人需要比成年人更多的睡眠，选A
【小题8】考查介词辨析：A. in在…里面，B. on在…上面，C. at在…地方，D. for为了，而且他们感到困的时间，at修饰times，选C
【小题9】考查副词辨析：A. excitedly令人兴奋地，B. early早的，C. casually随意地，D. naturally自然地，和能够自然醒来的时间，选D
【小题10】考查名词： A. form形式，B. means意味着，C. method方法，D. way道路，方式，感到困的时间，能够自然醒来的时间和感到要休息的时候转换的方式和大多数学校开始的时候是不相配的，选D
【小题11】考查名词：A. end结束，B. start开始，C. holiday假期，D. examination检查，这里指学校开始上课的时间，选B
【小题12】考查连词辨析：A. Since自从，B. For为了，C. Yet然而，D. The然后，很多年轻人在晚上11点前是不能入睡的，但是他们在早上6点或更早要起床去上课。表示转折关系，选C
【小题13】考查形容词辨析：A. nicer更好，B. earlier更早，C. cleaner更干净，D. better更好，这里指比6点更早，选B
【小题14】考查定语从句，先行词是a class，定语从句中缺少主语，用that引导定语从句，选A
【小题15】考查动词辨析：A. put放，B. take拿走，C. doze 打盹儿，打瞌睡，D. cut切割，很多学生在上课的时候会打盹，选C
【小题16】考查形容词辨析：A. next下一个，B. other其他的，C. last最后的，D. new新的，下一节课也会打盹，选A
【小题17】考查动词辨析：A. examined检查，B. surveyed调查，C. reported报告，D. convinced使…相信，在一个调查中，超过90%的年轻人报告他们的睡眠时间少于推荐的9个小时。选C
【小题18】考查动词辨析：A. regulated调节，调整，校准，控制，B. remended推荐，C. analyzed分析，D. reported报告，专家推荐年轻人每晚睡眠是9小时，选B
【小题19】考查词义辨析：A. Like象，B. Since自从，C. As因为，正如，D. Furthermore还有，正如James B. Maas观察的那样，大多数年轻人象行走的僵尸，选C
【小题20】考查连词：A. because因为，B. which哪里，C. while然而，D. still仍然，因为他们太困了，选A