单项选择题

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

A．To inquire about switching majors.
B．To find a helping supervisor.
C．To make up the remaining credits.
D．To apply for a master’s degree.

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问答题

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