Mr Reed made up his mind to devote all he had to ___ some schools for poor children.

问题描述:

Mr Reed made up his mind to devote all he had to ___ some schools for poor children.
a.set up b.setting up 为什么答案用b

先看看例句
"After he has retired, he will devote himself to gardening."
"退休后,他将要致力于园艺."
原来是devote sth to sth
or devote sth to doing sth