单项选择题

A．
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单项选择题
A．Mr. Black is free.B．Mr. Black is out.C．Mr. Black is busy.
A．Mr. Black is free.
B．Mr. Black is out.
C．Mr. Black is busy.
单项选择题
A．Climb hills.B．Go fishing.C．Go shopping.
A．Climb hills.
B．Go fishing.
C．Go shopping.
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