问题
选择题
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
答案
答案：D
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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
答案：D