问题
选择题
.---I didn't go to work yesterday because my car broke down.
---You ____ mine. I wasn't using it then.
A．might borrow
B．could have borrowed
C．must have borrowed
D．ought to borrow
答案
答案：B
该题考查虚拟语气的用法。从句意:“你本来是可以用我的车子，因我当时不用它，而你未用，”可知该空表示的是与过去事实相反的假设。用could have done。