He_______thebestpersonyouhadbeenexpectingforthejob,butwhoelse_______

He _______ the best person you had been expecting for the job, but who else _______?A.may not be; could beB.couldn’t be; might beC.might not have been; could have beenD.mustn’t be; must have been

C解析试题分析：句意：他可能不是你过去所期望的胜任这个工作最好的人，但是还有谁可能是呢？might not have been过去可能没有做某事，could have been过去能够做某事，根据句意，故选C.考点：情态动词与完成时态连用表推测。点评：本题是高考必考考点，一定要牢记句型意思。must have done过去肯定做了某事。should have done 本应该做而实际未做; can’t have done 过去不可能做了某;shouldn’t have done 本不应该做而实际做了; need have done 本有必要做某事;needn’t have done 本没有必要做某事,注意没有 mustn’t have done的形式

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