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【单选题】

The water will be further polluted unless some measures ________.
A.will be taken

B.are taken
C.were taken
D.had been taken
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根据网考网移动考试中心的统计,该试题:

3%的考友选择了A选项

78%的考友选择了B选项

17%的考友选择了C选项

2%的考友选择了D选项

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