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
网友回答
A. mustn’t
B. couldn't
(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。