Ответ:

1. If we had met Anna, we would have told her everything.

2. It is a pity that Tom has already left.

3. If I were you, I would not buy this car.

4. If I had gone to the meeting yesterday, I would have heard the latest news.

5. If we had a vacation now!

6. If we had not received this letter yesterday, my brother would be at home now.

7. If I knew English well, I would speak with the English yesterday.

8. It is a pity that you did not attend the exhibition.

9. It is a pity that I do not know French.

10. If I didn’t have to work so much today, we would go.

11. If the weather was good yesterday, we would have done. We drove to the park.

12. If I knew his phone number, I would call now. 13. It is a pity that it is raining.

14. If not for his help, I would not work now.

15. If I were you, I would wait.