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7.We _____have hurried all the way to the airport-the flight was called off because of the foggy weather.(  )
A.mustn'tB.couldn'tC.needn'tD.wouldn't

分析 我们不必一路急急忙忙地赶往机场,因为由于大雾天气,航班被取消了.

解答 答案:C 
A.mustn't 禁止,不允许;B.couldn't 不能;C.needn't 不必;不需要; D.wouldn't 不要;根据句意可知,由于大雾,航班已经被取消了,所以就没有必要再匆忙往那里赶了.故选C

点评 做此类题时,需要熟练掌握每一个情态动词的意义及用法,并且结合句意,找出贴合句意的情态动词.本题考查了needn't的用法,即needn't  意为:不需要;不必;强调了客观条件.

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