1. she ate a packet of biscuits while she was doing her homework
2.I was getting up when our friends arrived
3. While they were staying in Kenya they saw three elephants
4. We were taking our dog for a walk when started to rain.
5. They stayed in Los Angeles while they were going to Disneyland
6. She was watching a DVD when her mum phoned
7. While she was shopping in town she lost her purse