| 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．children | B．newborns | C．elders | D．youngsters |
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| 小题3: | | A．reduction | B．increase | C．growth | D．improvement |
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| 小题4: | | A．teenagers | B．students | C．babies | D．preschoolers |
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| 小题5: | | A．related | B．separated | C．aged | D．varied |
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| 小题6: | | A．demanding | B．challenging | C．satisfying | D．encouraging |
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| 小题7: | | A．adults | B．toddlers | C．babies | D．schoolchildren |
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| 小题9: | | A．excitedly | B．early | C．casually | D．naturally |
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| 小题10: | | A．form | B．means | C．method | D．way |
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| 小题11: | | A．end | B．start | C．holiday | D．examination |
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| 小题13: | | A．nicer | B．earlier | C．cleaner | D．better |
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| 小题17: | | A．examined | B．surveyed | C．reported | D．convinced |
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| 小题18: | | A．regulated | B．recommended | C．analyzed | D．reported |
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| 小题19: | | A．Like | B．Since | C．As | D．Furthermore |
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| 小题20: | | A．because | B．which | C．while | D．still |
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