Закончите предложения, используя PastSimple или PastContinuous: 1. I ..........................(to sleep) when my mother

1. I was sleeping when my mother came. 2. My mother and father were watching TV (смотрели)/ watched (посмотрели) TV when Billy was at school. 3. Billy was reading a book when/while Nina was listening to music. 4. Lola was coming back home (возвращалась домой) while her sister was cleaning the room.