◎ 题干
It was very kind of you to do the washing-up, but you _____ it.
A.needn’t doB.shouldn’t do
C.mustn’t have doneD.needn’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“It was very kind of you to do the washing-up, but you _____ it.A.needn’t doB.shouldn’t doC.mustn’t have doneD.needn’t have done…”主要考查了你对  【序数词】  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。