单项选择题

In order to improve our standard of living, we have to accelerate production.

A．step up
B．decrease
C．stop
D．control
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单项选择题
There are altogether 13 drags treating sleep disorders in the United States.
A． Right
B． Wrong
C． Not mentioned
单项选择题
FDA considers it the producers’ duty to ware the users of sleeping pills about the serious side effects and to tell them how to use safely.
A． Right
B． Wrong
C． Not mentioned
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