devote
vt.
1.将...奉献(给)[(+to)]
He devoted himself to writing.
他专心写作.
He was still devoted to the study of chemistry.
他仍专心致力于化学研究.
He has devoted his whole life to benefiting mankind.
他把一生都献给了造福人类的事业
在这里我要声明,答案是对的
楼上说的明显是错误的
缺少宾语!himself!
前半句话补全就是
He devote himself to his research work!
改成被动句,就是
Himself was devoted to his research work by he.
很明显这里缺少的恰恰是himself.
所以要用被动语态!