单项选择题

A．Doctor and patient.
B．Passenger and bus driver.
C．Teacher and student.
D．Customer and merchant.
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单项选择题
A
单项选择题
According to Joan Ryan, to become a sports writer, one must have the following except ______.
A．background knowledge
B．excellent writing skills
C．knowledge of successful experience from others
D．ability to face up to the difficulties when in trouble
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