单项选择题

A．Doctor and patient.
B．passenger and bus driver,
C．Customer and merchant.
D．Boss and secretary.
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单项选择题
A．In a restaurant.B．In a bar.C．On a jet.D．On an oceanliner.
A．In a restaurant.
B．In a bar.
C．On a jet.
D．On an oceanliner.
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