单项选择题

A．Preparing for the final exam.
B．Touring the town.
C．Making a trip to Los Angeles.
D．Going to an exhibition.
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单项选择题
A．Because they have a smooth surface.B．Because they are very expensive.C．Because they are very hard.D．Because they turn very. well.
A．Because they have a smooth surface.
B．Because they are very expensive.
C．Because they are very hard.
D．Because they turn very. well.
填空题
dangerous
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