单项选择题

A．Student and professor.
B．Athlete and coach.
C．Client and lawyer.
D．Patient and doctor.
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单项选择题
A．English.B．History.C．Biology.D．Geography.
A．English.
B．History.
C．Biology.
D．Geography.
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 a 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 a long-distance call.
D．You can get a credit coupon when you give the phone number.
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