A. Keprike’s research tool B. Dangers of Habitual shortages of sleep C. Criticism on Kripke’s report D. A way of overcoming inso

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问题 A. Keprike’s research tool
B. Dangers of Habitual shortages of sleep
C. Criticism on Kripke’s report
D. A way of overcoming insomnia ,
E. Sleep problems of long and short sleepers   
F. Classification of sleep problems
A. fall asleep again
B. become more energetic the following day
C. sleep less than 7 hours
D. confh’m those serious consequences
E. suffer sleep problems   
F. sleep more than 8 hours

选项

答案F

解析 根据搭配结构need to do sth.判断所有选项都在语法上合适。借助搭配句意“为了获得晚上好的休息,人们没有必要……”判断F(睡眠超过8小时)。
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