单项选择题

Questions 15～18 are based on the following conversation.
What are the man and the woman doing

A．Trying to telephone someone.
B．Waiting in line.
C．Canceling reservations.
D．Attending a concert.

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单项选择题

Questions 15～18 are based on the following conversation. What are the man and the woman doing 您的浏览器不支持 audio 元素。