单项选择题

Questions 14 -16 are based on the following passage. You now have 15 seconds to read Questions 14 -16.
According to officials, what percentage of the flights at O’ Hare were delayed during the first seven months of this year

A．65%.
B．56%.
C．75%.
D．57%.

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单项选择题

单项选择题

Questions 14 -16 are based on the following passage. You now have 15 seconds to read Questions 14 -16. According to officials, what percentage of the flights at O’ Hare were delayed during the first seven months of this year 您的浏览器不支持 audio 元素。