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单项选择题


A．out
B．off
C．through
D．over
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单项选择题A．bidB．gameC．competitionD．contest

A．bid
B．game
C．competition
D．contest

单项选择题From Paragraph 5 we can learn that ______.

A．the number of segregated smokers is on the rise
B．the number of male smokers is decreasing gradually
C．the number of female smokers is increasing now
D．the number of nonsmokers is larger than that of smokers