单项选择题

Questions 22 to 25 are based on the conversation you have just heard.

A．A chemistry experiment.
B．A class that the woman is taking.
C．A job possibility the woman expecting.
D．A study that their chemistry professor did.

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单项选择题

Questions 22 to 25 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。