单项选择题

A．Husband and wife.
B．Doctor and patient.
C．Teacher and student.
D．Customer and shopkeeper.
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单项选择题
A．New products promotion.B．Computer sales negotiation.C．A job interview.D．An internet seminar meeting.
A．New products promotion.
B．Computer sales negotiation.
C．A job interview.
D．An internet seminar meeting.
单项选择题
A．85.B．90.C．93.D．97.
A．85.
B．90.
C．93.
D．97.
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