Correct the mistakes.
1. Sue was sewing her dress while the phone 2. My daughter had been finishing her homework rang. by the time I came back from work.
3. Yesterday we were buying Christmas presents for our parents.
4. Before I went to bed I was brushing my teeth.
5. Nick was repairing his bike when his sister was watching him.
6. I had listened to my favourite CD for half an hour before I fell asleep.
7. When we were on holidays last summer we were going to the beach every day.
8. Zoe tidied up her room before she had gone out to see her friends.
9. Tom was going home earlier yesterday because he had terrible toothache.
10. I read an interesting article when the lights went off.​