1. It was. 2. When did you meet. 3. I have not seen. 4. Have you gathered. 5. Where have you put. 6. The new school began working. 7. I have done. 8. The building of the house began. 9. The rain has stopped. 10. We have already solved. 11. He came. 12. I have never spoken. 13. He has just finished. 14. Have you made. 15. What books did you read, you lived. 16. They have not yet come. 17. He was, he has recovered. 18. Everybody has read. 19. Have you booked, I have, I booked. 20. I have not seen, you left, you have changed.