Nancy’ s gone to work but her car’ s still there. She______by bus.

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问题 Nancy’ s gone to work but her car’ s still there. She______by bus.

选项 A、must have gone
B、should have gone
C、ought to have gone
D、could have gone

答案A

解析 考查情态动词。句意为“南希已去上班,但她的车还在那儿。她一定是乘了公交车去的”。must have done是对过去事情的肯定推测,符合句意。should/ought to have done“本应该做某事却没有做”,could have done“本可以做某事却没有做”,显然均不符合题意。
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