单项选择题

A．Patient—doctor.
B．Secretary—boss.
C．Student—teacher.
D．Waiter—customer.
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单项选择题
A．What the flight number is.B．Where to find a telephone.C．What time the flight departs.D．Where to board the plane.
A．What the flight number is.
B．Where to find a telephone.
C．What time the flight departs.
D．Where to board the plane.
填空题
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