单项选择题

A．Taxi driver and passenger
B．Doctor and patient
C．Shop assistant and customer
D．Waiter and guest
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单项选择题
The other eight contestants went back for the boy because ______.
A．the boy asked them back
B．the boy was their friend
C．they would not be allowed to continue the race without him
D．they wanted to see if the boy was all right
单项选择题
A．At the airportB．In the libraryC．At the bankD．At the post office
A．At the airport
B．In the library
C．At the bank
D．At the post office
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