SIMPLE PAST OR PAST CONTINUOUS???

1. HE WAS DRIVINGDROVE WHEN HIS CAR BROKE DOWNWAS BREAKING DOWN
2. I WAS THINKING THOUGHT ABOUT HIM WHEN HE SUDDENLY CALLED WAS CALLING ME
3. THEY ARRIVED WERE ARRIVING WHILE WE WERE GOING AWAY WENT AWAY
4. MY AUNT WAS SITTING SAT ON A BENCH WHEN IT STARTED WAS STARTING TO RAIN
5. WHILE I WAS USING USED THE COMPUTER, THE LIGHT WENT OUT WAS GOING OUT
6. SHE WAS LOOKING LOOKED OUT OF THE WINDOW WHEN HE ENTERED WAS ENTERING THE ROOM
7. WHILE WE WERE HAVINGHAD LUNCH, SOME GUESTS ARRIVED WERE ARRIVING
8. THE BURGLARS WERE ESCAPING ESCAPED WHEN THE POLICE WAS ARRIVING ARRIVED