16. What you (do) when I (ring) you last night?
17. Up to then I never (see) such a fat man.
18. I (not see) him since last Monday.
19. They had sold all the books when we (get) there.
20. I think he (leave) as soon as he (know) the news.
21. She (play) the piano when our guests (arrive) last night.
22. He (come) and (see) you soon.
23. I (come) as soon as I have finished my work. You (be) ready?
24. My mother (come) to stay with us next weekend.
25. Where you (spend) your holidays next summer?
