【题目】He devoted all his spare time the old in his community.
A.into helping B.in helping C.helped D.to helping
【答案】D
【解析】
考查固定短语。句意:他把所有的业余时间都用来帮助社区里的老人。根据短语sb devote one’s time to doing sth.表示“某人把时间花在做某事上”,可知应选D。