单项选择题

Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. Most complaints take _____ to investigate.

A．two weeks
B．less than two weeks
C．two to three weeks
D．more than three weeks

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单项选择题

单项选择题

Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. Most complaints take _____ to investigate. 您的浏览器不支持 audio 元素。