单项选择题

Questions 22～25 are based on the following conversation. What are the speakers mainly discussing

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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单项选择题
A．as soon asB．whenC．beforeD．after
A．as soon as
B．when
C．before
D．after
单项选择题
Who do you think the woman is talking to
A．A clerk at the airport information desk.
B．A clerk at the railway station information.
C．A policeman.
D．A taxi driver.
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