第 6 部分：完形填空(第 51-6 5 題，每題 1 分，共 1 5 分)

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Taking a Nap D uring the Day

Medical experts say most Americans do not get 51 sleep. They say more Americans need to rest for a short period in the middle of the day. They are advising people to sleep lightly before 52 with other activities.

O n e study earlier this year found that persons w h o sleep for a few minutes during the day were less 53 to die of disease. The study followed more than 2,300 Greek adults 54 about six years. Adult w h o rested for half an hour 55 three times a week had a 37 percent lower risk of dying from heart disease than those w h o did not nap.

Study organizers said the strongest evidence was in working men. They said naps might improve 56 by mitigating tension caused by work.

Some European and Latin American businesses have supported the 57 of napping for m a n y years. They urge people to 58 work, go h o m e and have a nap before returning. In the United States, some companies let workers rest briefly in their offices. They believe this reduces in their offices. They believe this reduces 59 and accidents, and 60 increases the amount of work a person can do.

Sleep experts say it is likely that people ma k e more mistakes at work than at other times. They say people should not carry out important duties w h e n they feel 61 . A n d they say the best thing to do is to take a nap.About twenty minutes of rest is 62 you need. Experts say this provides extra energy and can increase your effectiveness 63 the end of the day. But experts warn that 狂 nap 64 last no more than twenty to thirty minutes. A longer nap will put the body into deep sleep and waking up will be 65 .

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51. A. sweet B.sound C. bad D.enough

52. A. checking B. sharing C. continuing D. meeting

53. A. lovely B. likely C. fondly D. finely

54. A. for B. at C. in D. with

55. A. at least B. at most C. at last D. at first

56. A. ability B. health C. thinking D. life

57. A. experiment B. reform C. idea D. w a y

58. A. repeat B. improve C. change D. leave

59. A. work B. mistakes C. energy D. time

60. A. never B. seldom C. too D. also

61. A. ready B. good C. sleepy D. awake

62. A. all B. few C. any D. nothing

63. A. unless B. while C. until D. during

64. A. would B. m a y C. might D. should

65. A. helpful B. difficult C. easy D. happy

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