题目内容

Mr. Black decided to give up his farm and devoted all his time to_______those children living on the street.
A.help B.being helpedC.be helpingD.helping
D
考查非谓语动词.句意:布莱克决定放弃他的农场,把所有时间投入到这些生活在大街上的孩子身上.本句中to是介词,后面接名词或者动名词做宾语,选项B表示被动动作,故选D.
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