He _____ by herself since her divorce (live)

18. He
by herself since her divorce (live)
19. I was angry that I
such a stupid mistake (make).
20. I predict that by 2020, man
on Mars (land)
21. He
his job a couple of years ago. (quit)
22. Our daughter
from the university yet (gradate).
23. They
any Christmas cards last year (not send)
24. She
to a doctor once a year for an examination (go)
25. They
about me when I interrupted their conversation. (talk)
26. Nothing much
when I got to the meeting (happen).