It had been raining three days before we arrived so we might as well at home.A. stayB. t

问题补充：

It had been raining three days before we arrived, so we might as well at home.

A. stay

B. to stay

C. have stayed

D. to have stayed

答案：

(答案→)A. stay

B. to stay

C. have stayed

D. to have stayed

解析：考查短语：might as well do 不妨做某事，句意：在我们到达之前已经下了三天的雨了，因此我们不妨呆在家里吧。所以选A。