There is a mistake in each sentence, find it out and correct it.
1. " What's the wrong with you? ""I've got a backache."
2. I was a little scared when the dentist fills a cavity in my tooth.
3. I am glad to hear you well.
4. He gave up to smock two years ago.
5. I have a painful very toothache.
6. Brush your teeth very day is very important.
7. Why doesn't Lan go to school yesterday?
8. How much time a week do you wash your clothes?
9. After talking to Hoa, Minh felt fewer scared.
10. You look tired. You had better to have some days off.