The professor devoted all his life the treatment of AIDS．A.to researchB.in resea
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The professor devoted all his life ____the treatment of AIDS．
A.to research
B.in researching
C.to researching
D.at researching
试题答案
C
短语devote….to “专心于”to为介词后接动名词。句意：教授把他的一生都致力于艾滋病的治疗。