[题目]Mary have arrived ten minutes earlier but her flight was held up because of the heavy fog.A. need B. can C. should D. must 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】Mary _______ have arrived ten minutes earlier but her flight was held up because of the heavy fog.

A. need B. can C. should D. must

【答案】C

【解析】

试题分析：考查情态动词和虚拟语气。句意：玛丽本应该十分钟前到，但她乘坐的航班因大雾而延误了。情态动词+have done可以表示对过去事情进行推测，need have done本来需要做某事；can/can’t have done(不)可能已经做了某事；must have done一定已经做了某事；should/shouldn’t have done本(不)应该做某事。这里指的是“本应该早点到”，故选C。

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