Past Simple/Past Contonuous

I ___________ (play) the piano when I _________ (hear) a scream.

Petro _________ (not see) the accident because he ___________ (work) in the back garden.

My dog __________ (bite) Dan when he ___________ (jog) in the park.

I __________ (not rob) the jewellery shop - I _______ (play) tennis with my friends all night.

When the manager ____________ (come) into the room, all the workers ________ (talk) about him.

It ______ (snow) heavily when the plane ________ (crash).