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[主观题]
Questions 1 to 3 are based on the passage you have just heard。A.The importance of sleep to
Questions 1 to 3 are based on the passage you have just heard。
A.The importance of sleep to a healthy life。
B.Reasons for Americans’ decline in sleep。
C.Some tips to improve the quality of sleep。
D.Diseases associated with lack of sleep。
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