If ____, the dirty air will lead you to fall ill.A.breathe inB.you to breathe in

If ____, the dirty air will lead you to fall ill.A.breathe inB.you to breathe in

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If ____, the dirty air will lead you to fall ill.
A.breathe inB.you to breathe in C.breathing inD.breathed in

答案
D
解析
考查非谓语动词。句意:如果被吸入,这些脏空气会导致你生病。过去分词表示被动的动作和句子主语是动宾关系,结合语境可知选D。
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