It is important____ we all _____to make our city a better place to live in

问题描述:

It is important____ we all _____to make our city a better place to live in
A 、for ,help B、that,to help C、for,to help
D、that,help
并说明为什么?

D
有we(主格)可以确定后面应该是个从句,所以前一个空应该是个连词,而不是个介词.排除A、C.
再说,既然是从句,help就应该做谓语用,又排除B.