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We must do something to factories waste water into the river before it is cleaned. A. stop; pouring

编辑:chaxungu时间:2026-05-02 04:42:54分类:高中生物题库

We must do something to _____ factories _____waste water into the river before it is cleaned.

A. stop; pouring . B. prevent; to pour C. keep; pouring D. stop; to pour

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A