问题补充:
Mr. Black decided to give up his farm and devoted all his time tothose children living on the street.
A. help
B. being helped
C. be helping
D. helping
答案:
A. help
B. being helped
C. be helping
(答案→)D. helping
解析: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.