单项选择题

A．You are welcome.
B．It doesn’t matter.
C．You are all right.
D．Don’t mention it.
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单项选择题
A．In a reading room.B．In a classroom.C．In a gardenD．In a shop.
A．In a reading room.
B．In a classroom.
C．In a garden
D．In a shop.
填空题
usually
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