The most important thing to do is to find a room

The most important thing to do is to find a room( ).
A.living B.to live C.living in D.to live in
为什么呢？麻烦帮我指导一下这类题，我一直搞不清楚，谢谢！

The most adoring person the most interesting ting what hurts the most 请问The most和most的区别 most和the most的区别 most of与 most of the as with most disease,the poor suffer the most.翻译 the most widely spoken language the most faithful 什么意思 most of 后面加不加the？