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【单选题】

________into oceans and rivers is a serious form of pollution.
A.Pouring sewage

B.Emptying litter
C.Throwing garbage
D.Dumping sewage
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根据网考网移动考试中心的统计,该试题:

0%的考友选择了A选项

15%的考友选择了B选项

1%的考友选择了C选项

84%的考友选择了D选项

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