We have hurried all the way to the airport - the flight was called off because of the fogg

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

C. needn’t

D. wouldn’t

答案：

A. mustn’t

B. couldn

(答案→)C. needn’t

D. wouldn’t

解析：考查情态动词的完成式：句意：你不必一路赶到机场，因为大雾天气航班已经推迟了。Must和完成式连用，用于肯定句，couldn’t have done过去不可能做了，needn’t have done过去本没有必要做…而做了，wouldn’t have done过去本不会做而做了。选C。