单项选择题

Questions 14～17 are based on the following dialogue.
When does this conversation most probably take place

A．At the beginning of the semester.
B．At the middle of the semester.
C．During the vacation.
D．At the end of the semester.

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单项选择题

单项选择题

Questions 14～17 are based on the following dialogue. When does this conversation most probably take place 您的浏览器不支持 audio 元素。