It's _____to play computer games.(A:waste time B:a wsate of time C:waste of time D:a waste time)选哪个?为什么?

问题描述:

It's _____to play computer games.(A:waste time B:a wsate of time C:waste of time D:a waste time)选哪个?为什么?

B,a waste of+n.固定搭配,浪费……
a waste of time——浪费时间