The river ______ badly now. We must do something to stop the waste water from being poured into it.
| A．is polluting |
| B．pollutes |
| C．is being polluted |
| D．has polluted |
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The river ______ badly now. We must do something to stop the waste water from being poured into it.
| A．is polluting |
| B．pollutes |
| C．is being polluted |
| D．has polluted |
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