关于found的问题如题 The bridge was painted a dull green color.Under

关于found的问题
如题
The bridge was painted a dull green color.Under any other circumstances I probably ____ it ugly.
A had found
B have found
C must have found
D would have found
这个题目应该选哪个呀?
怎么翻译这句话呀?
为什么这样选择呢?