We have two rooms to live in, but I can't decide .
A. to choose which one
B. choose which one
C. which one to choose
D. which one will I choose
网友回答
A. to choose which one
B. choose which one
(答案→)C. which one to choose
D. which one will I choose
解析：特殊疑问词+to do 如果特词为疑问代词，do为及物动词，而特词为疑问副词时，do 为及物动词后接宾语，故选C