oIt 's raining now ,let's --- until the rain stops.A don't g

选B not go out
外边正在下雨,雨停之前我们就不要出去了
let比较特殊肯定型：let's go out
但是否定却不是 don't go out
例如：
Let us not split hairs over words,let us look at the facts.
咱们不要抠字眼,咱们看看事实吧.