Past continuos

I was studying when they came here.
She was cooking all the morning while I was reading the book.
We were running when he won the prize.
I was helping in the race when they WERE AT home.
He was sleeping while I was working.
She was showering AT home when they came to eat.
They were swimming in my swimming pool while I was listening TO music.
We were eating while he was speaking with the OWNER of the place.
We were dancing in the disco when they were eating in the restaurant.
They were travelling while we were waiting there.