The flu is believed ________ by viruses that like to reproduce in the cell inside the human nose and throat.A．causingB．being causedC．to be causedD．to have cause-高中英语-n多题

◎ 题干

The flu is believed ________ by viruses that like to reproduce in the cell inside the human nose and throat.

A．causing	B．being caused
C．to be caused	D．to have caused

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◎ 解析

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◎ 知识点

根据n多题专家分析，试题“The flu is believed ________ by viruses that like to reproduce in the cell inside the human nose and throat.A．causingB．being causedC．to be causedD．to have cause…”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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