---He made up his mind to devote his life pollution happily.
A. to prevent;to live
B. to prevent;from living
C. to preventing; to live
D. to preventing;from living
网友回答
A. to prevent;to live
B. to prevent;from living
(答案→)C. to preventing; to live
D. to preventing;from living
解析：考查词组和不定式做目的状语：第一空的to，用来构成固定搭配devote ... to ... 把……奉献给……，此处to是介词。所以prevent要用ing形式，第二空to live 不定式作目的状语，句意：为了过上幸福的生活，他下定决心一生致力于防止污染。