20. I got up early this morning, but I ________ so because I was not on duty today.A．mustn’t have doneB．needn’t have doneC．didn’t need to doD．can’t have do-高中英语-n多题

◎ 题干

20. I got up early this morning, but I ________ so because I was not on duty today.

A．mustn’t have done	B．needn’t have done
C．didn’t need to do	D．can’t have done

◎ 答案

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“20. I got up early this morning, but I ________ so because I was not on duty today.A．mustn’t have doneB．needn’t have doneC．didn’t need to doD．can’t have do…”主要考查了你对【虚拟语气】，【情态动词】等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。

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