Ответы и объяснения

When I was reading, a telephone rang.
Children were sleeping when she came home.
I was walking to school, when I saw the car accident.
The boys were playing football when I saw them.
My mother was baking a cake, and when I came home.
When I was walking to the shop, I saw a fire.
Children were skating, when the ice cracked.
I broke his leg when he went skiing.
Alice was looking at herself in the mirror when I came in.
I was painting a picture when my mum called me.