单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．Computer sales negotiations.
B．A preliminary interview.
C．An Internet seminar meeting.
D．Computer games.

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单项选择题

单项选择题

Questions 19 to 22 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。