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

A．Giving a lecture.
B．Discussing political science.
C．Working on a science problem.
D．Reading twentieth-century literature.

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从何处得知信息；2．自己胜任并需要这份工作的理由；3．希望对方安排时间面谈。 An Application Letter

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