单项选择题

A．At the airport.
B．By plane.
C．Taking the air.
D．On radio and TV.
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单项选择题
A．People can call you back if necessary.B．You can dial a special number free.C．You don’t need to pay for long distance call.D．You can get a credit coupon when you give the phone number.
A．People can call you back if necessary.
B．You can dial a special number free.
C．You don’t need to pay for long distance call.
D．You can get a credit coupon when you give the phone number.
填空题
D
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