let's stop__ to keep the earth beautiful and clean.pollute)polluting还是pollution?

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let''sstop__tokeeptheearthbeautifulandclean.pollute)polluting还是pollution?let''sstop__tokeeptheearthbea

let's stop__ to keep the earth beautiful and clean.pollute)polluting还是pollution?
let's stop__ to keep the earth beautiful and clean.pollute)
polluting还是pollution?

let's stop__ to keep the earth beautiful and clean.pollute)polluting还是pollution?
stop doing sth 停止正在做某事
stop polluting 停止污染