◎ 题干
-Must I clean the floor now?
-_____. It is too dirty.
[     ]
A. Yes, you needn't
B. No, you needn't
C. No, you mustn't
D. Yes, you must
◎ 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“-Must I clean the floor now?-_____. It is too dirty.[ ]A. Yes, you needn'tB. No, you needn'tC. No, you mustn'tD. Yes, you must…”主要考查了你对  【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。