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

Окончите предложения, используя PastSimple либо PastContinuous: 1. I ..........................(to sleep) when my mother ______(to come). 2. My mother and father ....................(to watch TV) when Billy _______(to be) at school. 3. Billy ........................(to read) a book when Nina _________(to listen) to music. 4. Lola ..................(to come back) home while her sister.....................(to clean) the room.