– Look at these factories. I hate them. They____ many rivers here. --Yes. Something ______ to stop the pollution.A．polluted, must do B．had polluted , must b-初中英语-n多题

◎ 题干

– Look at these factories. I hate them. They____ many rivers here.
--Yes. Something ______ to stop the pollution.

A．polluted, must do	B．had polluted , must be doing
C．have polluted , must be done	D．were polluting, must be done

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“– Look at these factories. I hate them. They____ many rivers here. --Yes. Something ______ to stop the pollution.A．polluted, must do B．had polluted , must b…”主要考查了你对【一般现在时】，【过去进行时】，【过去完成进行时】等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。

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