问题
选择题
(2013·江苏南通市二模)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
答案：C
选C 考查情态动词。句意：我们本不必一路上都着急去机场的——航班因为大雾天气被取消了。needn't have done表示“本不必做却做了”，符合句意。