单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．A notice on the bulletin board.
B．A book for a class the man is taking.
C．A chemistry class that is being taught.
D．The library reserve desk.

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单项选择题

单项选择题

Questions 23 to 25 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。