单项选择题

Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions.
How many times has the woman taken the train to Chicago

A．Never.
B．Once before.
C．Twice before.
D．Three times befor

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单项选择题

单项选择题

Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. How many times has the woman taken the train to Chicago 您的浏览器不支持 audio 元素。