题目内容


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