Question

-Did you blame him for his mistakes?

-Yes, but I'd rather ________ it．

1. A.
   not do
2. B.
   not to do
3. C.
   have not done
4. D.
   not have done

Answer 1

D
I would rather后面只能跟动词原形不能跟不定式，排除B项；not不能放在have前，排除C项；此句表示我当时不责备他就好了，因此用完成式，排除A项。