What brings back your interest ____ body building all of a sudden?这句话填什么?怎么翻译或解释

in
interest,interested都与in搭配.in+感兴趣的东西.那用to 有什么不对么your interst in sth.你对某物的兴趣。如果用to，句子就应当还要加一些成分：What brings back your interest in body building to you all of a sudden?your interest in body building是brings back 的直接宾语，中间不能加to。