but +do/+to do的用法

but +do/+to do的用法
很不明白but 后面什么时候+do,什么时候+to do?
eg: Although many people are in pursuit of fame and wealth,I desire nothing but______a happy life.
A.to live B.live C.living D.lived
请高手们帮忙解答,谢谢!