问题
选择题
If I had been a little more careful, I _______the wallet behind.
A．won't leave
B．hadn't left
C．didn't leave
D．wouldn't have left
答案
答案：D
题目分析：句意：如果我能小心一些，我就不会丢下钱包了。If条件句用了had done，说明是和过去相反的虚拟语气，主句用would have done表示对过去情况的虚拟，所以选D。