单项选择题

The study shows that the longer you sleep each night, the' longer you'll live.

A． Right
B． Wrong
C． Not mentioned
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单项选择题
All the participants were from the state of California.
A． Right
B． Wrong
C． Not mentioned
单项选择题
The findings indicate that it is all right to sleep for 6.5 hours a night.
A． Right
B． Wrong
C． Not mentioned
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