— My colleague felt quite happy because his solution was closer now to — Congratulations!

网友回答

A. having adopted
B. be adopted
(答案→)C. being adopted
D. be adopted
解析：考查固定搭配。was closer now to是用的be close to结构，to 是介词，后面要跟动词的ing形式，排除B,D；且主语his solution和动词adopt之间是动宾关系，所以要用doing的被动式，选C。