单项选择题

How many tablets at most can a person over 12 have in 24 hours

A．Three.
B．Four.
C．Six.
D．Eight.
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单项选择题
It can be inferred from the directions that this medicine ______.
A．helps you to fall asleep quickly
B．may be dangerous to small children
C．cannot be taken if one feels sleepy
D．should not be taken by children under six
单项选择题
Which of the following is true
A．People have done. nothing to get rid of the tsetse flies.
B．People are trying to find out ways to get rid of the tsetse flies.
C．No ways can be found to get rid of the tsetse flies.
D．It won't be long before people get rid of all the tsetse flies in Africa.
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