单项选择题

Questions 17 ～ 20 are based on a monologue by a tour guide giving some information about the BART system. You now have 20 seconds to read Questions 17 ～ 20.
At least how much money must be added to an old ticket for a new one

A．40 dollars.
B．7.95 dollars.
C．5 cents.
D．50 cents.

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单项选择题

单项选择题

Questions 17 ～ 20 are based on a monologue by a tour guide giving some information about the BART system. You now have 20 seconds to read Questions 17 ～ 20. At least how much money must be added to an old ticket for a new one 您的浏览器不支持 audio 元素。