单项选择题

Questions 15～18 are based on the following conversation. At what stage is the woman, in her studies

A．She is a teaching assistant.
B．She is a senior.
C．She is a graduate student.
D．She is a junior.

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单项选择题

单项选择题

Questions 15～18 are based on the following conversation. At what stage is the woman, in her studies 您的浏览器不支持 audio 元素。