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问个英语题目1.We never pay attention to pretect the water.这个句子有语病吗

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问个英语题目
1.We never pay attention to pretect the water.这个句子有语病吗?
2.The waste water from factories ____great harm to the river and sea.空白处应该填do,did,还是done.
求高手解答,好的加分
1.We never pay attention to protecting the water.
2.The waste water from factories ____great harm to the river and sea.空白处应该填does.