帮助他人能够使我们自己开阔眼界.we can ___ ____ our eyes to the outside world by ____others

题目

帮助他人能够使我们自己开阔眼界.we can ___ ____ our eyes to the outside world by ____others

答案

一般开阔眼界是用broaden one's horizon 吧,这里用open up 也可以.open up one's eyes to sth.
by是介词,后面接动名词 helping.