听录音填空。（10分）
I don’t like ______ in the city because it isn’t clean. _______ from cars and factories makes the ____ dirty. Rubbish makes the street dirty and ______. It ____ makes the river dirty. To _____ the city clean, I think we should ______ some factories ______ and put rubbish in the ____. We should not _____ so much or put rubbish in the water.
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