.---I didnt go to work yesterday because my car broke down.-You mine. I wasnt using

问题补充：

.---I didn go to work yesterday because my car broke down.

---You mine. I wasn using it then.

A. might borrow

B. could have borrowed

C. must have borrowed

D. ought to borrow

答案：

A. might borrow

(答案→)B. could have borrowed

C. must have borrowed

D. ought to borrow

解析：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。