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：考察固定搭配和不定式用法。本句中含有固定搭配devote…to…致力于，把…花在…之上；其中的to是介词，后面要接动名词的形式。第二空考察的是不定式在句中作目的状语。句意：为了生活的幸福，他下定决心要把他的一生都用在预防污染上。故C正确。