单项选择题

A．Once a week.
B．Twice a week.
C．Three times a week.
D．Four times a week.
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单项选择题
A．He isn’ t sure.B．He will go by plane.C．He will go by train.D．He will go by bus.
A．He isn’ t sure.
B．He will go by plane.
C．He will go by train.
D．He will go by bus.
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