单项选择题

A．Customer and assistant.
B．Father and daughter.
C．Dentist and patient.
D．Teacher and student.
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单项选择题
A．Ask for a job interview.B．Talk about the arrangement of a news conference.C．Make a discussion about the new book.D．Make an appointment with the man.
A．Ask for a job interview.
B．Talk about the arrangement of a news conference.
C．Make a discussion about the new book.
D．Make an appointment with the man.
单项选择题
A．beforeB．whileC．asD．until
A．before
B．while
C．as
D．until
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