Answer
1. They were writing the test at this time yesterday.
2. He was working in the garden from six till nine o'clock.
3. We were watching television the whole evening.
4. Were you playing chess at six o'clock?
5. Were you drinking tea at seven o'clock?
6. He was drawing from three till five o'clock.
7. Who was listening to the radio at this time?
8. Was it raining the whole day yesterday?
9. They were skating at five o'clock.
10. She was not helping mother about the house from two till seven.