1. At this time yesterday I was sitting at the theatre.
2. He came back to St. Petersburg on the 15th of January.
3. I was going to the institute when I saw him.
4. At this time yesterday we were having dinner.
5. He was writing a letter when I came in.
6. He was making a report when I was leaving the meeting.
7. Yesterday he wrote a letter to his friend.
8. When I looked at them, they smiled at me.
9. What were you doing at six o'clock yesterday?
10. I went to bed at half past eleven.
11. Yesterday the lesson began at nine o'clock.
12. The cat took a piece of fish and then ran away.
13. He was reading a newspaper when I came in.
14. Yesterday I got up at seven o'clock.
15. The train started at fifteen minutes to ten.
16. He put on his coat and cap, opened the door and went out.