问题
选择题
I_______ such a foolish mistake if I had been a little more careful.
A．wouldn’t make
B．wouldn’t have made
C．hadn’t made
D．didn’t make
答案
答案：B
这道题是一个与过去事实相反的虚拟语气，if条件从句用的是过去完成时态，主句应用would have done 结构。因此答案选B.