If it ___rain tomorrow.We'll have a sports meeting.

问题描述:

If it ___rain tomorrow.We'll have a sports meeting.
A.won't B.don't C.doesn't D.isn't

应该选 C
if 引导条件状语从句,主句用将来时,从句用一般现在时.
如果明天不下雨,我们将开运动会.为什么要用助动词啊?助动词帮助构成 否定句。