Food safety is one of the problemsnow all over the world.A．discussedB．to be discussed C．being discussedD．having been discussed-高中英语-n多题

◎ 题干

Food safety is one of the problems now all over the world.

A．discussed	B．to be discussed
C．being discussed	D．having been discussed

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“Food safety is one of the problemsnow all over the world.A．discussedB．to be discussed C．being discussedD．having been discussed…”主要考查了你对【现在分词的被动式】，【现在分词】，【不定式的被动式】，【过去分词】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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