按原句意思改写句子

题目

按原句意思改写句子
The professor has worked hard with the project for several years,so he succeeds now.
_____ _____ several years _____ hard work,the professor _______ now.
你们认为这三空该怎么填,请给出建议和理由,

答案

Because of,of,succeeds
因为几年的努力工作,教授现在成功了