Question

Fill in the blanks choosing the correct form of verb given in brackets : If I ----------------- everything about him , I wouldn't have cared for these silly matters.

• A. know
• B. knew
• C. have known
• D. had known

Answer 1

Answer:

D. had known

This is a third conditional sentence :

If + past perfect --- would have + past participle

" Had known " is the correct form here.