◎ 题干
Some of the rubbish, such as wood, paper and iron, _____ away over a long period of time.
[     ]
A. rot
B. are rotted
C. is rotting
D. rots
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Some of the rubbish, such as wood, paper and iron,_____ away over a long period of time. [ ]A. rot B. are rotted C. is rotting D. rots …”主要考查了你对  【一般现在时】【主谓一致】  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。