单项选择题

A．About one month.
B．About two months.
C．About two and a half months.
D．About three months.
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单项选择题
A．To ask if you may smoke.B．To go to special sections for smokers.C．To smoke before him.D．To offer him one before you light up a cigarette.
A．To ask if you may smoke.
B．To go to special sections for smokers.
C．To smoke before him.
D．To offer him one before you light up a cigarette.
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