单项选择题

A．Brush your teeth right before you go to bed in the evening.
B．Have as few of your teeth pulled out as possible.
C．Have your teeth X-rayed at regular intervals.
D．Clean your teeth shortly after eating.
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单项选择题
A．To the dentist’s.B．To the market.C．To the post office.D．To the bookstore.
A．To the dentist’s.
B．To the market.
C．To the post office.
D．To the bookstore.
单项选择题
A．Shifting job opportunities.B．The evolution of the weekend.C．Attitudes toward employment.D．Attitudes toward leisure activities.
A．Shifting job opportunities.
B．The evolution of the weekend.
C．Attitudes toward employment.
D．Attitudes toward leisure activities.
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