1. Ann was smiling when he saw her. - Was Ann smiling when he saw her?2. She was talking to someone when they came up to her. - Was she talking to someone when they came up to her?3. The children were singing when Mother returned home. - Were the children singing when mother returned home? 4. We were waiting for a bus when it began to rain. - Were you waiting for a bus when it began to rain?5. The boys were learning to drive when we saw them. - Were the boys learning to drive when you saw them?6. Mother was cooking supper at that moment. - Was mother cooking supper at the moment? 7. We were sitting in the living-room when it happened. - Were you sitting in the living-room when it happened? 8. Helen was working in the garden from 8 till 12 o’clock. - Was Helen working in the garden from 8 till 12 o'clock? 9. They all were watching TV when Mike came into the room. - Were they all watching TV when Mike came into the room?