Question

If I ____ more about diamond, I ____ cheated by that man.

1. A.
   had known, would not be
2. B.
   had known; wouldn’t have been
3. C.
   knew; would not have been
4. D.
   had known; would never be

Answer 1

B
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。