2017高考英语一轮专项训练：完形填空及阅读理解（8）含答案_高考复习指南

　　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.

　　59 _ 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.

　　41. A. children B. newborns C. elders D. youngsters

　　42.A. from B. with C. out D. up

　　43. A. reduction B. increase C. growth D. improvement

　　44. A. teenagers B. students C. babies D. preschoolers

　　45. A. related B. separated C. aged D. varied

　　46.A. demanding B. challenging C. satisfying D. encouraging

　　47. A. adults B. toddlers C. babies

　　D. schoolchildren

　　48. A. in B. on C. at D. for

　　49. A. excitedly B. early

　　C. casually D. naturally

　　50. A. form B. means C. method D. way

　　51. A. end B. start C. holiday D. examination

　　52. A. Since B. For

　　C. Yet D. Then

　　53. A. nicer B. earlier

　　C. cleaner D. better

　　54.A. that B. its C. what D. whose

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