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No wonder you caught a cold. You________have gone out last night without a coat.
A.shouldn’tB.mustn’t
C.couldn’tD.mightn’t
A
考查虚拟语气。句意:怪不得你会感冒。你昨晚不该没穿外套就出去。“shouldn’t+have+done”表示本来不应该做某事,而实际做了;“mustn’t +have+done”表示对过去事情的否定推测,译成“一定没有做过某事”; “couldn’t +have+done”表示对过去事情的假设,意思是本来不能够做某事而做了;“mightn’t +have+done”表示对过去已经发生的事情的推测,might与may意思相同,但可能性更小。结合语境可知选A。
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