单项选择题

A．Not at all.
B．It’s my pleasure.
C．No problem.
D．Thank you very much.
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单项选择题
A．In a book-store.B．In the police station.C．In a supermarket.D．In the classroom.
A．In a book-store.
B．In the police station.
C．In a supermarket.
D．In the classroom.
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