◎ 题干
The professor devoted all his life __________ the treatment of AIDS.
A.to research
B.in researching
C.to researching
D.at researching
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The professor devoted all his life __________ the treatment of AIDS.A.to researchB.in researchingC.to researchingD.at researching…”主要考查了你对  【一般过去时】【一般过去时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。