单项选择题

Questions 11-13 are based on the following dialogue.
Why did John make the call

A．He wanted to check the order number.
B．He wanted to order some computers.
C．He wanted to report a problem.
D．He wanted to see the secretary.

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单项选择题

Questions 11-13 are based on the following dialogue. Why did John make the call 您的浏览器不支持 audio 元素。