Ответ:

1)I was listening to the radio while Mary was cooking dinner.

2)Did you buy this book yesterday?

3)When does your brother usually get home in the evening?

4)Jane always brings us a nice present.

5)Have you read this book?

6)While Fred was sleeping, Judy was watching TV.

8)Look there! Sue and Tim are running to school.

9)Joe bought a car yesterday.

10)Their father often goes to rock concerts.