1.Tim called when she was doing homework.
2.Yesterday at 3 p.m. I did the shopping.
3.Her sister was making a cake when they arrived.
4.Who was making notes when you entered the room.
5.Mrs.Atwood was making dinner when Mr.Atwood was working in the garden.
6.What he did when she was parking a car?
7.Did she work on a computer at 8 p.m. yesterday?