1. are going
2. go
3. isn't drinking
4. won't
5. are speaking (Are they speaking English now?)
6. do speak (What language do they usually speak?)
7. came; was sleeping
8. didn't; was playing; will play
9. met; was going
10. will go
11. opened; were sitting
12. was playing; came
13. will sit
14. did have (Did you have supper at nine o'clock yesterday?)
15. is; are coming, are driving или was; were coming; were driving