单项选择题

A．Six.
B．Eight.
C．Seven.
D．Nine.
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单项选择题
The author’’ s purpose in writing this article is to ______.
A．inform readers of Heller’’ s findings in his researches
B．persuade readers to get enough sleep at different ages
C．show readers the importance of getting enough sleep
D．tell readers how many hours of sleep they should get
单项选择题
A．It was stolen.B．It was given a ticket.C．She couldn’’t find it.D．She found it towed away by the police.
A．It was stolen.
B．It was given a ticket.
C．She couldn’’t find it.
D．She found it towed away by the police.
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