选哪个?请给出原因.A.leavinguntreatedB.leavinguntreatingC.leftuntreatedD.leftuntreatingIf,thewoundinyourarmmaybecomeinfected.

Question

选哪个?请给出原因.A.leaving untreated B.leaving untreating C.left untreated D.left untreating
If_______,the wound in your arm may become infected.

Answer 1

C.这是一个强调句.完整的句子是这样的：If it was left untreated,the wound in your arm may become infected.
因为the wound 和leave是被动关系,所以leave用过去分词形式,就是left.untreated是形容词,意思是未经治疗的,没有untreating这种说法,所以选C.句意：如果不处理的话,你胳膊上的伤口会感染.