单项选择题

A．To practice more on volleyball.
B．To have good rest after practice.
C．To eat more healthily.
D．To focus on her study.
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单项选择题
According to the passage, an unlabeled use of a drug is any use that ______.
A．has been reviewed by the FDA and specifically rejected
B．is medically beneficial despite the fact that such use is prohibited by law
C．is made in experiments designed to determine whether a drug is medically beneficial
D．has medical value but has not yet been approved by FDA for inclusion as a labeled use
单项选择题
From the passage we can conclude that the U.S. has come to realize _________.
A．the weakening if the U.S. dollar can result in trade deficits
B．the lower the retail prices, the greater the profits
C．tourism can make great contributions to its economy
D．visitors to the U.S. are wealthier than U.S. tourists abroad
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