We have hurried all the way to the airport—the flight was called off because of the foggy

问题补充：

We have hurried all the way to the airport—the flight was called off because of the foggy weather.

A. mustn’t

B. couldn’t

C. needn’t

D. wouldn’t

答案：

A. mustn’t

B. couldn’t

(答案→)C. needn’t

D. wouldn’t

解析：考查情态动词。mustn’t不应该，不可以；couldn’t不可能；needn’t不必；wouldn’t不会。句意：我们本没有必要一路匆忙地赶往机场，航班因为大雾取消了。所以选C。