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

A．It may not pay well.
B．It may not come on time.
C．It may not take your goods.
D．It may charge the quote.

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单项选择题

Questions 19 to 21 are based on the conversation yon have just heard. 您的浏览器不支持 audio 元素。