________ water is a slowly exchanging pool, and once it becomes polluted it is difficult to clean up.

Bubbles1999

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________ water is a slowly exchanging pool, and once it becomes polluted it is difficult to clean up.

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Bubbles1999 Author

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6 years ago

My teacher is very rude and likes to speed his way through a lesson without letting the class ask questions. Thank you for helping me. You're a life saver Slight Smile

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