单项选择题

A．A professor and a student.
B．A customer and a cashier.
C．An editor and an author.
D．A lawyer and his client.
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单项选择题
A．He hasn’t the time to do the experiment.B．The experiment turned out well.C．The experiment took him a lot of time.D．He did only part of the experiment that day.
A．He hasn’t the time to do the experiment.
B．The experiment turned out well.
C．The experiment took him a lot of time.
D．He did only part of the experiment that day.
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