单项选择题

A．Under 18.
B．Under 16.
C．Over 19.
D．Under 17.
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单项选择题
A．The great numbers of people engaged in cigarette producing.B．The rapid development of cigarette-making machine.C．The rapid development of cigarette-making factories.D．The increasing output of tobacco.
A．The great numbers of people engaged in cigarette producing.
B．The rapid development of cigarette-making machine.
C．The rapid development of cigarette-making factories.
D．The increasing output of tobacco.
单项选择题
A．whyB．howC．whereD．when
A．why
B．how
C．where
D．when
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