Helyesek az alábbi angol mondataim? (Mindegyik múlt)

1. When a kind couple gave them a ride, they had been hitchhiking for hours.

2. I was doing aerobics all the evening the day before yesterday.

3. She wasn't at home yesterday.

4. I had worked in Los Angeles from 1990 to 1992.

5. After he had drunk it, he collapsed.

6. By the time I got my passport, I was expecting it for a month.

7. Pat was peeling potetoes while her mother was grating cheese.

8. Janis was correcting papers when Steve woke up.

9. When we entered the house, the charwoman had been cleaning the bedrooms for two hours.

10. Jill fell asleep after the alarm-clock had gone off.

11. I satisfied with him because he had solved the problem.

12. I earned a lot of money last month.

13. He was walking int he street when a flower-pot fell upon his head.

14. I had bought 2 kilos of peaches int he market before I went home.

15. My brother was beating the drum for almost twenty minutes when we turned up at his house.