单项选择题

A．A professor and a student.
B．A hotel manager and a tourist.
C．A salesman and a customer.
D．A store owner and his manager.
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单项选择题
A．Language courses.B．Universities.C．British and American English.D．Literature courses.
A．Language courses.
B．Universities.
C．British and American English.
D．Literature courses.
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