Помогите вставить пропущенные глаголы в правильно форме (Past Simple, Past Continous)

1. We were playing volleyball with Mary when you called me. 2. When the teacher came in, they were studying English. 3. The baby was sleeping when the telephone rang. 4. As I was walking in the streets of Holland, I met an old friend of mine. 5. I lost my car keys. 6. I was looking for my purse when I dropped my credit card. 7. My uncle took me to the airport yesterday. 8. She was dancing when she hurt her ankle. 9. It was raining heavily when I got up. 10. I saw the thief while he was getting into my neighbor’s house.