1993年6月六级试题及答案8
31. People in the 18th and 19th centuries used to sleep about 9.5 hours a night because they
had
A) no drive and ambition B) no electric lighting
C) the best sleep habits D) nothing to do in the evening
32. According to Dr. David, Americans
A) are ideally vigorous even under the pressure of life
B) often neglect the consequences of sleep deficit
C) do not know how to relax themselves properly
D) can get by on 6.5 hours of sleep
33. Many Americans believe that __
A) sleep is the first thing that can be sacrificed when one is busy
B) they need more sleep to cope with the complexities of everyday life
C) to sleep is something one can do at any time of the day
D) enough sleep promotes people's drive and ambition
34. The word "subjects" (Line 1, Para.4)refers to
A) the performance tests used in the study of sleep deficit
B) special branches of knowledge that are being studied
C) people whose behavior or reactions are being studied
D) the psychological consequences of sleep deficit
35. It can be concluded from the passage that one should sleep as many hours as is necessary to
A) improve one's memory dramatically
B) by considered dynamic by other people
C) maintain one's daily schedule
D) feel energetic and perform adequatel