单项选择题

Questions 11-13 are based on the following talk.
How often is the bus scheduled to pass the stop

A．Every ten minutes.
B．Every twenty minutes.
C．Every half an hour.
D．Once a day.

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单项选择题

单项选择题

Questions 11-13 are based on the following talk. How often is the bus scheduled to pass the stop 您的浏览器不支持 audio 元素。