1. When he came home his wife was cooking dinner.
2. When I came to his place he had already left.
3. What were you doing yesterday at 10.20 p,m,? - Mr. X: I was playing tennis with my brother.
4. The policeman asked me if I saw the accident.
5. He had written a letter by 5 o'clock yesterday.
6. I had put my hand in my pocket for the money, but it was empty.
7. When I got to the cinema, the film had started.