At that time I have no choice but _____(wait) for help.为什么用to wait

问题描述:

At that time I have no choice but _____(wait) for help.为什么用to wait

在含介词but的句型中,but前有do,则but后的不定式不能带to;相反,but前若找不到do,则but后的不定式必定带to.
所以本题很明显要用to wait