Respuesta:
1. tried
2. didn't order
3. phoned
4. played
5. arrived / missed
6. studied / passed
7. called
8. spoke
9. got up
10. did / went
11. found
12. followed
13. worked
14. stopped / called
15. tried
16. paid
17. catch / was
18. left
19. knew / were
20. brought