◎ 题干
—I do believe the scientific explanation that when a tomb is opened, the fresh air disturbs the viruses inside it. What about you?
—So do I. If _______ in, the disturbed viruses may cause illness or even death.
A.breathingB.breathedC.being breathedD.to breathe
◎ 答案
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◎ 解析
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◎ 知识点
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