单项选择题

A．Teacher and student.
B．Doctor and patient.
C．Manager and office worker.
D．Travel agent and customer.
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单项选择题
A．He’s been to Seattle many times.B．He has chaired a lot of conferences.C．He has a high position in his company.D．He lived in Seattle for many years.
A．He’s been to Seattle many times.
B．He has chaired a lot of conferences.
C．He has a high position in his company.
D．He lived in Seattle for many years.
单项选择题
A．Brother and sister.B．Mother and son.C．Teacher and student.D．Classmates.
A．Brother and sister.
B．Mother and son.
C．Teacher and student.
D．Classmates.
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