单项选择题

Questions 15 to 18 are based on the conversation you have just heard.
According to the man, how many magazines should one read in order to keep up in his own field

A．Twenty or thirty a month.
B．Twenty a month.
C．Twenty or thirty a year.
D．Thirty a year.

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单项选择题

单项选择题

Questions 15 to 18 are based on the conversation you have just heard. According to the man, how many magazines should one read in order to keep up in his own field 您的浏览器不支持 audio 元素。