Industrial cities such as Chicago and Detroit have severely ____ the waters of the Great Lakes.( )(本题1.0分)<br>A、 pollutions<br>B、 polluting<br>C、 pollutes<br>D、 polluted

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Industrial cities such as Chicago and Detroit have severely ____ the waters of the Great Lakes.( )(本题1.0分)
A、 pollutions
B、 polluting
C、 pollutes
D、 polluted

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