I knocked into a tree when I went to the railway station to meet my friend.I suppose you ( )

问题描述:

I knocked into a tree when I went to the railway station to meet my friend.I suppose you ( )
I suppose you ( ) too fast
为虾米用were driving

确定第一句主语没错~感觉两句没啥太大关系.
不过硬要填空的话还是要过去进行时,题意是说我去见朋友的时候,你撞上树了,我猜你当时开得很快.他是对当时情况的一个猜想.