单项选择题

Questions 22 to 25 are based on the conversation you have just heard.
What do customers complain about most often

A．Electrical appliances.
B．Travel agencies.
C．Photographic and sound equipment.
D．Clothing.

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单项选择题

Questions 22 to 25 are based on the conversation you have just heard. What do customers complain about most often 您的浏览器不支持 audio 元素。