Ответ:
1. We were walking along the forest road when it started snowing.
2. This is the first time I have been late for my Japanese classes.
3. It’s nearly twenty years since my father has seen his brother.
4. When the old lady returns to her flat she sees at once that someone has broken in during her absence.
5. Then he put his hand on her shoulder.
6. I wonder if Wayne is ill – he is getting thinner and thinner.
7. As soon as you finish what you’re doing, I would like to speak to you.
8. We were hurrying because we thought that the bell had already rung.
9. By the time he retires Professor Baker will have taught more than twenty different courses.
10. The plane takes off at 10.30 and lands at 16.15.
11. In the future, people will spend their holiday in space.
12. Since I started university, I haven’t had much spare time.
13. James Watt invented the steam engine.
14. After he had researched and written his paper, he found some additional material.
15. While the workers were repairing the roof, they broke the bathroom window.
16. What did you do while you were waiting for the others to come?
17. Don’t you think Ian looks just like his father?
18. I had read the whole of «War and Peace» by the time I was seven years old.
19. ‘Why were you so tired yesterday?’ ‘Because I had been jogging all morning.’
20. When are you going to finish this test? I have finished it already.
21. After George had returned to his house, he watched TV.
22. Steve called me at 9.30 last night.