◎ 题干
— Catherine, I have cleaned the room for you.
— Thanks. You _____ it. I could manage it myself.
[     ]
A. needn't do
B. needn't have done
C. mustn't do
D. shouldn't have done
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“Heis __________ ping-pong.[ ]A. playB. playingC. plays…”主要考查了你对  【虚拟语气】  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。