1.When Alice was back, I was listening to the radio.
2.When mother came in the room,he was drawing a picture.
3.He didn't open the window before lessons.
4.What did he do 10 years ago?
5.Why were you angry at me yesterday?I wasn't angry.
6.When I came to the bus station,I saw a boy who was playing with dog.
7.Why weren't you at the doctor yesterday?
I wasn't I'll.
8.My brother was washing the dishes while I was cleaning floor.
9.She came home at 11 o'clock,and because of it she didn't call you.