单项选择题

A．A chemistry assignment.
B．A study that their chemistry professor did.
C．A class that the woman is taking.
D．A possible job.
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Thomas Elliott
单项选择题
A．Calling someone.B．Attending a concert.C．Waiting in line.D．Canceling reservation.
A．Calling someone.
B．Attending a concert.
C．Waiting in line.
D．Canceling reservation.
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