单项选择题

A．Employ them as lab assistants.
B．Teach classes at their high school.
C．Help them with their studies.
D．Pay them for participating in the study.
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单项选择题
A．They were both busy doing their own work.B．They waited for each other at different places.C．They went to the street corner at different times.D．The man went to the concert but the woman didn’t.
A．They were both busy doing their own work.
B．They waited for each other at different places.
C．They went to the street corner at different times.
D．The man went to the concert but the woman didn’t.
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