1.The doorbell was ringing while i was sleeping
2.We saw an accident while we were driving a car
3.Tina fell asleep while she was Learning English
4.She was sunbathing, while we were playing golf
5.Sam wasn’t looking at the camera, when the photograph took a photo of him
6.Ben didn’t listen to me when i was talking to him!
7. The kids were eating a chocolate cake, when Mom came home
8. The students were walking in the park while the teacher was checking their tests
9. Kate was reading a book when the light went down
10.We were watching a film, when our friends called
Вот это нормальный ответ!