. Open the brackets, putting the verb into the necessary tense form.
1. We _____________________ (to walk) along the forest road when it started snowing.
2. This is the first time I ______________ (to be) late for my Japanese classes.
3. It’s nearly twenty years since my father _________________ (to see) his brother.
4. When the old lady returns to her flat she___________ (to see) at once that someone has broken in during her absence.
5. Then he ___________ (to put) his hand on her shoulder.
6. I wonder if Wayne is ill – he ________________ (to get) thinner and thinner.
7. As soon as you _________________ (to finish) what you’re doing, I would like to speak to you.
8. We were hurrying because we thought that the bell _________ already___________ (to ring).
9. By the time he retires Professor Baker __________________ (to teach) more than twenty different courses.
10. The plane ________________ (to take off) at 10.30 and ______________ (to land) at 16.15.
11. In the future, people ________________________ (to spend) their holiday in space.
12. Since I ___________________ (to start) university, I haven’t had much spare time.
13. James Watt__________________ (to invent) the steam engine.
14. After he had researched and ___________ (to write) his paper, he found some additional material.
15. While the workers were repairing the roof, they ______________ (to break) the bathroom window.
16. What did you do while you _________________ (to wait) for the others to come?
17. Don’t you think Ian ______________________ (to look) just like his father?
18. I ______________________ (to read) the whole of War and Peace by the time I was seven years old.
19. ‘Why were you so tired yesterday?’ ‘Because I _____________________ (to jog) all morning.’
20. When are you going to finish this test? I _________________ (to finish) it already.
21. After George had returned to his house, he ___________________ (to watch) TV.
22. Steve ________________ (to call) me at 9.30 last night.