We should do as much as we can _____ our country better and more

We should do as much as we can _____ our country better and more beautiful.
A、make
B、to make
C、makes
D、making
【正确答案】：B
【题目解析】：考查省略。句中We should do as much as we can，后省略do，后面接不定式作目的状语，故选B。