题目

---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：B 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。

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