i knocked into a tree when i went to thre railway stationfor my friend.

问题描述:

i knocked into a tree when i went to thre railway stationfor my friend.
i suppose you ________too fast.
A drive B are driving C drove D were driving
但我想不通啊

过去进行时,说明当时你正开的很快,而且knocked表明只能选过去时