Put the verbs in the brackets in the correct form.

1. Adam wasn't at home when I called in. He .............................. (may/ be) in the sports centre.
2. We .............................. (not talk) to each other since we .............................. (quarrel) two months ago.
3. After .............................. (graduate) from college, I am going to start .............................. (study) sociology.
4. By next Friday, we .............................. (certainly/ finish) .............................. (wallpaper) the children's room.
5. Mary regrets .............................. (not go) to yesterday's party with us.
6. Where .............................. (Cindy/walk) when you met her?
7. The police .............................. (investigate) the crime since January, but they .............................. (find) nothing of interest as yet.
8. .............................. (the general/read) the instructions before he gave orders to his officers?
9. You .............................. (should not/shout) at your girlfriend. She's crying now.
10. Whatever .............. (happen), I .............................. (always/stand) by you, I promise.