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1 . The time she has devoted in the past decade ______ the disabled is now considered to be very valuable.
A.helpingB.to help
C.to helpingD.for helping
2016-12-12更新 | 74次组卷 | 1卷引用:2014-2015学年安徽黄山屯溪第一中学高一上期中英语试卷
共计 平均难度:一般