单项选择题

A．Once a week.
B．Once two weeks.
C．Once a month.
D．Once three weeks.
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单项选择题
A．To buy cigarettes with less tar.B．To smoke only a few cigaretes a day.C．To smoke only during a break.D．To give up smoking entirely.
A．To buy cigarettes with less tar.
B．To smoke only a few cigaretes a day.
C．To smoke only during a break.
D．To give up smoking entirely.
单项选择题
A．A policeman.B．A porter.C．A customs officer.D．A hotel clerk.
A．A policeman.
B．A porter.
C．A customs officer.
D．A hotel clerk.
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