the river becomes ()because the paper factory pours waste water into it九下英语作业本
问题描述：
the river becomes ()because the paper factory pours waste water into it
九下英语作业本
答
the river becomes (contaminated) because the paper factory pours waste water into it.
河水被污染，因为造纸厂把废水倒进河里。
答
dirty（脏兮兮，不干净的）
答
The river becomes polluted because the paper factory pours waste water into it.