单项选择题

Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
According to the woman, what could have caused the problem

A．Damage to the equipment.
B．The line upgrading.
C．The man’s wrong operation.
D．Not mentione

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单项选择题

单项选择题

Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. According to the woman, what could have caused the problem 您的浏览器不支持 audio 元素。