The professor devoted all his life the treatment of AIDSA to research B．in researching C

发布时间：2020-08-16 14:03:56

The professor devoted all his life     the treatment of AIDS．
A to research           B．in researching C．to researching   D．at researching

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解析：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。
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