I will take a trip to the countryside unless it __________.

问题描述:

I will take a trip to the countryside unless it __________.
A. will rainB. rainsC.won’t rainD. doesn’t rain
是B还是D,搞不清楚了,怎么解释啊
B的话,除非下雨,我们就去。。。。?好像不通啊

是B对‘ 除非下雨’
如果是D,应该是I will take a trip to the countryside ifit __________.