Supervisor and student．,Colleagues．,Editor and contribu-找考题网

单项选择题

A．Supervisor and student.
B．Colleagues.
C．Editor and contributor.
D．Customer and typist.

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单项选择题A．The history of background music.B．The function of background music.C．The way background music is played.D．The popularity of background music among workers.

A．The history of background music.
B．The function of background music.
C．The way background music is played.
D．The popularity of background music among workers.

单项选择题A．It makes the workers excited.B．It helps to reduce workers’ complaint.C．It makes workers spend less time having their dinner.D．It might make the production increas

A．It makes the workers excited.
B．It helps to reduce workers’ complaint.
C．It makes workers spend less time having their dinner.
D．It might make the production increas

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