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If in, viruses can result in illness or even death.A.breathe B.breathing C.breat

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If in, viruses can result in illness or even death.A.breathe B.breathing C.breat

If ____ in, viruses can result in illness or even death.

A.breathe B.breathing
C.breathed D.to breathe

试题答案

C

解析试题分析:句意:如果被吸进体内,病毒能够导致疾病甚至死亡。此处是“连词+非谓语”结构做状语,句子主语viruses和breathe之间是动宾关系,故用过去分词表示被动,选C。

考点:考查非谓语动词。