◎ 题干
When a tomb is opened, fresh air disturbs the viruses. If _____, they can result in illness or even death.

[     ]

A. breathe in
B. to be breathed in
C. breathing in
D. breathed in
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“When a tomb is opened, fresh air disturbs the viruses. If _____, they can result in illness or even death. [ ]A. breathe in B. to be breathed in C. breathin…”主要考查了你对  【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。