The boy ______cake when his mother came into the room

The boy was eating cake when his mother came into the room.

Was the boy eating cake when his mother came into the room?

The boy was making cake when his mother came into the room. 

Was the boy making cake when his mother came into the room?

The boy was drawing cake when his mother came into the room.

Was the boy drawing cake when his mother came into the room?

The boy was painting cake when his mother came into the room.

Was the boy painting cake when his mother came into the room?