II. Cloze

　　There are 20 blanks in the following passage(s). For each blank are provided four choices marked A, B, C, and D. Choose the ONE that best completes the passage(s)

　　People tend to sleep more lightly and for shorter time spans as they get older, although they generally need about the same 31 of sleep as they 32 in early adulthood. About half of all people over 65 have 33 sleeping problems, such as insomnia, and deep sleep 34 in many 35 people often become very short or 36 completely. This 37 may be a normal part of aging, 38 it may result from medical problems that are common in elderly people and 39 the medications and 40 treatments for those problems.

　　Experts say that if you feel drowsy during the 41 , even during boring activities, you 42 had enough sleep. If you routinely fall 43 within 5 minutes of lying down, you probably have severe 44 deprivation, possibly even a sleep 45 . Microsleeps, or very brief episodes of sleep in an otherwise 46 person, are another mark of sleep deprivation. In many cases, people are not 47 that they are experiencing microsleeps. The widespread 48 of “burning the candle at both ends” in western industrialized societies has 49 so much sleep deprivation that 40 is really abnormal sleepiness is now almost the norm.

　　(C)31. A. account B. number C. amount D. quantity

　　(D)32. A. demanded B. required C. requested D. needed

　　(A)A33. A. frequent B. often C. once D. almost

　　(B)34. A. steps B. stages C. stances D. status

　　(A)35. A. elderly B. oldly C. older D. elder

　　(D)36. A. state B. stay C. start D. stop

　　(B)37. A. shift B. change C. transfer D. vary

　　(A)38. A. or B. and C. but D. else

　　(D)39. A. at B. in C. with D. from

　　(C)40. A. another B. the other C. other D. others

　　(A)41. A. day B. night C. evening D. morning

　　(D)42. A. didn’t B. hasn’t C. hadn’t D. haven’t

　　(B)43. A. sleepy B. asleep C. drowsy D. fainted

　　(C)44. A. asleep B. rest C. sleep D. drowsy

　　(D)45. A. symptom B. disease C. illness D. disorder

　　(B)46. A. wake B. awake C. waking D. awaking

　　(A)47. A. aware B. away C. wary D. wearing

　　(C)48. A. work B. exercise C. practice D. drill

　　(A)49. A. created B. contributed C. conducted D. conduced

　　(D)50. A. it B. this C. which D. what