2.
My grandmother (was dancing) to a Michael Jackson CD when i arrived.
3.
The cats (were sitting) on top of the piano, so I couldn't play.
4. I
(was drawing) a picture of the teacher on the board when he came into the room.
5.
We (were laughing) loudly, so we didn't hear the bell.
6.
Mum and Dad (were kissing) when we opened the door.
7.
Nigel (was trying) to do his homework on the bus.