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．It sells record players.B．It sells dogs.C．It teaches a dog to listen to a record.D．It is a victorious company.
A．It sells record players.
B．It sells dogs.
C．It teaches a dog to listen to a record.
D．It is a victorious company.
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