单项选择题

A．Half a year.
B．Two years.
C．Three or four years.
D．More than five years.
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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 job possibility.
A．A chemistry assignment.
B．A study that their chemistry professor did.
C．A class that the woman is taking.
D．A job possibility.
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Margaret Stephens
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