单项选择题

The average number of hours of sleep that an adult needs is（）

A．approximately six hours
B．around ten hours
C．about eight hours
D．not stated here

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单项选择题
This passage suggests that not getting enough sleep might make you（）

A．dream more often
B．have poor health
C．nervous
D．breathe quickly
单项选择题
The word drowsy in the last paragraph means（）

A．sick
B．stand up
C．asleep
D．a little sleepy
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