1. Father was watching TV at ten o'clock yesterday.
2. I went to bed at nine o'clock yesterday.
3. I finished my homework at nine o'clock yesterday.
4. I was playing the piano at five o'clock yesterday.
5. He began to do his homework at four o'clock yesterday.
6. She was playing the flute at four o'clock yesterday.
7. I met Nick at three o'clock yesterday.
8. When I came home, Kate was playing the piano.
9. When I met John, he was going to the railway Station.
10. When I was going to the museum, I saw a big crowd of people in the street.
11. They played in the yard in the evening yesterday.
12. They played in the yard the whole evening yesterday.
13. I was cleaning my teeth at eight o'clock in the morning yesterday.
14. We went to the wood in summer.
15. When the teacher opened the door of the classroom, the pupils were sitting at their desks.
16. He got up at seven o'clock yesterday.
17. Father came home at six o'clock yesterday.
18. I was reading abook at six o'clock yesterday.
19. She fell asleep at eleven o'clock yesterday.
20. Mother was drinking tea at eleven o'clock yesterday.