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I got up early this morning, but I so because I had no work to do. [ ] A.mustn't

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I got up early this morning, but I so because I had no work to do. [ ] A.mustn't

I got up early this morning, but I ________ so because I had no work to do.

[]

A.mustn't have doneB.didn't need to doC.needn't have doneD.can't have done

试题答案

答案:C