| 1. A: Were they watching TV at midnight? B: No, they weren't. |
| 2. We were eating lunch in the cafeteria at noon. |
| 3. A: Were you talking on the phone a few minutes ago? B: No, I wasn't. |
| 4. I was walking home when I saw the car accident. |
| 5. My classmate and I were studying together at the library. |
| 6. While he was cleaning the house, we were cooking. |
| 7. A: What were you doing at one o'clock? B: I was sleeping. |
| 8. The car engine was working, so I had to fix it. |
| 9. A: Were you listening to the teacher? B: Yes, I was. |
| 10. At seven o'clock, Mr. Smith was robbing the bank. |
| 11. Steven was doing his homework, he was playing with his friends. |
| 12. It was raining last night, so I took my umbrella. |
| 13. Anne was studying in London last year. |
| 14. I was working as a teacher when I first met your mother. |
| 15. We were swimming while you were playing volleyball. |