题目内容：

-I didn't go to Mary's party last because my car broke down.-You could have borrowed mine.I wasn'
A,hadn't used B,wasn't using C,didn't use D,wouldn't use
为什么用过去进行时
落了！I wasn't____it

优质解答

表示假设如果当时怎么样,实际上已经不可能重来一次,所以用过去进行时.