题目内容
The smelly water has been found_______ and no longer usable until the chemicals and wastes are removed from it.
A. to be polluted B. having polluted
C. polluting D. polluted
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题目内容
The smelly water has been found_______ and no longer usable until the chemicals and wastes are removed from it.
A. to be polluted B. having polluted
C. polluting D. polluted