单项选择题

Questions 19 to 21 are based on the conversation you have just heard.

A．Having interviews with authorities.
B．Arranging professor’s schedule.
C．Finding information for a book.
D．Traveling to South America.

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单项选择题

单项选择题

Questions 19 to 21 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。