单项选择题

A．Librarian and student.
B．Boss and secretary.
C．Operator and caller.
D．Customer and repairman.
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单项选择题
A．Yes, I look pale.B．I’ve got a headache.C．Nor am I.D．Don’t mention it.
A．Yes, I look pale.
B．I’ve got a headache.
C．Nor am I.
D．Don’t mention it.
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