单项选择题

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

A．A player of background music.
B．A researcher on the function of background music.
C．A composer of background music.
D．A fan of background music.

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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。