A brillant idea occurred to him,_____to his research in the lab.A.while devoting B.while devoting himself C.while he was devoted D.while devoted选项是D.为什么用被动不用主动

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A brillant idea occurred to him,_____to his research in the lab.A.while devoting B.while devoting himself C.while he was devoted D.while devoted选项是D.为什么用被动不用主动
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A brillant idea occurred to him,_____to his research in the lab.A.while devoting B.while devoting himself C.while he was devoted D.while devoted选项是D.为什么用被动不用主动
A brillant idea occurred to him,_____to his research in the lab.
A.while devoting B.while devoting himself C.while he was devoted D.while devoted选项是D.为什么用被动不用主动

A brillant idea occurred to him,_____to his research in the lab.A.while devoting B.while devoting himself C.while he was devoted D.while devoted选项是D.为什么用被动不用主动
这句的主语是A brillant idea,不是he,所以不能用主动语态

be devoted to
or
devote oneself in

本句中的devoted是形容词
完整形式是 while he was devoted to his research in the lab.
因为前后主语一致,省略了主语及系动词也可以正常使用

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