单项选择题

Questions 11-13 are based on a dialogue between a clerk of Air-ticket Booking Office and a customer.
Where does the conversation take place

A．At an airport.
B．On the phone.
C．In a ticket office.
D．We don’t know.

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单项选择题

单项选择题

Questions 11-13 are based on a dialogue between a clerk of Air-ticket Booking Office and a customer. Where does the conversation take place 您的浏览器不支持 audio 元素。