单项选择题

How long have the woman been working in the lab

A．Basic research.
B．Develop new products.
C．The dialogue doesn’t tell us.
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单项选择题
A．In an office.B．On the street.C．On the plane.
A．In an office.
B．On the street.
C．On the plane.
单项选择题
A．Bachelor.B．Master.C．Doctor.
A．Bachelor.
B．Master.
C．Doctor.
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