单项选择题

A. Teacher and student.
B. Nurse and patient.
C. Lawyer and client.
D. Boss and secretary.
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单项选择题
A. Of course not. B. Please close the door. C. Is it cold D. Please don’t close the door.
A. Of course not. B. Please close the door.
C. Is it cold D. Please don’t close the door.
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