单项选择题

Without enough sleep, people would be ______.

A．in poor health
B．in good health
C．physically energetic
D．mentally energetic
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单项选择题
The author writes this passage so as to inform you of ______.
A．the comparison between babies and the elderly
B．the result of the survey recently taken in Shanghai
C．the importance of high-quality and sufficient sleep
D．the positive and negative effect of sufficient sleep
单项选择题
When finding it difficult to fall asleep, people would usually rely on ______.
A．sleeping pills
B．counting in bed
C．tossing in bed
D．turning in bed
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