So many natural disasters are believed___________over the recent years because of the frequent unreasonable mankind activities.A．to have come aboutB．to come abo-高中英语-n多题

◎ 题干

So many natural disasters are believed___________over the recent years because of the frequent unreasonable mankind activities.

A．to have come about	B．to come about
C．coming about	D．to be coming about

◎ 答案

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“So many natural disasters are believed___________over the recent years because of the frequent unreasonable mankind activities.A．to have come aboutB．to come abo…”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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