Ответ:

1. lived

2. has lived

3. has stopped

4. stopped

5. has bought

6. bought

7. has blew off

8. has changed

9. changed

10. traveled

11. has traveled

12. have seen

13. saw

14. met

15. I have just met

16. the children have already decided

17. decided

18. haven`t seen.

saw ..., but you didn`t see me. I was...