填空题

A. fall asleep again
B. become more energetic the following day
C. sleep less than 7 hours
D. confirm those serious consequences
E. suffer sleep problems
F. sleep more than 8 hours One survey showed that people who habitually ______ each night have a higher risk of dying.

【参考答案】

C
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单项选择题
The expression second on the list in the second paragraph means ______.
A．the second least important cause of sleeplessness
B．the second most important cause of sleeplessness
C．the second on the doctor’s list about sleepless people
D．the second on the writer’s list recording sleeplessness
单项选择题
An allergic reaction to sleeping pills may sometimes cause a user to die.
A． Right
B． Wrong
C． Not mentioned
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