单项选择题

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

A．At this moment.
B．After he selects courses.
C．At the end of the first year.
D．At the end of the first semester.

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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。