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【题目】Mary devoted much of her time _______ the disabled people.

A.in helpingB.to helpingC.helpD.to help

【答案】B

【解析】

句意:玛丽把她的大部分时间花在帮助残疾人上。

考查动词固定用法,根据动词devote的固定用法“devote to doing sth致力于做某事”,这里的to是介词,应该接动词ing形式,故选:B

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