Нужно выполнить это задание

1. If people were wiser,they (25) any wars.
| WOULD NOT START |
2. If had known the situation was so serious,I (26) him to hospital at once.
| WOULD HAVE BRING |
3. If I (27) the motive for this crime, it would be easier to find the criminal. But i still have no idea of the motive.
| UNDERSTOOD |
4. I would have come to your party if only I (28) about it completely.
| HAD NOT FORGOTTEN |
5. If you (29) me a few days ago,I would have changed my plans. But now, I'm sorry, I can't cancel all my arrangements for this week.
|HAD CALLED |
6. If I (30) your brother, I would never forgive you. But I can't feel angry with you for long.
|WERE NOT |