Re bonjour ! x)
1. I was talking to my mother when the phone ring.
2. She was making a cake when they come back.
3. I was doing my homework when the programme start.
4. He was driving his parents' car when he/they have an accident.
5. She was practising the guitar when she hear a noise.
J'espère que mes réponses sont justes,
Bonne journée !