John.........(was repairing) his motor bike
when his mother.......(arrived).
I.........(was eating) my lunch when the phone .........( rang ).
He ........(was riding) his bicycle to school when he.......(dropped) his bag.
We .......(saw) a bad accident as we......(were driving) to the airport.
Tom ........(was watching) the match when the TV.......(broke down).
We.......(were talk) when she.......(came) into the room.