If I more about diamond, I cheated by that man.
A. had known, would not be
B. had known; wouldn’t have been
C. knew; would not have been
D. had known; would never be
网友回答
A. had known, would not be
(答案→)B. had known; wouldn’t have been
C. knew; would not have been
D. had known; would never be
解析：这题考查if的非真实条件句，根据句意：如果我知道更多的关于钻石，我就不会被那个人骗了。说明是和过去相反的情况，if条件句用过去完成时，主句用would have done。选B。