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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A．They don’t have their own cars to drive to work.B．Many of them are romantic by temperament.C．Most of them enjoy the drinks on the boat.D．They tend to be more friendly to each other.
A．They don’t have their own cars to drive to work.
B．Many of them are romantic by temperament.
C．Most of them enjoy the drinks on the boat.
D．They tend to be more friendly to each other.
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