1. I (used to use to) collect stamps when I was nine years old.
2. My father (used to/ use to) be an excellent student at university.
3. I didn't (used to use to) eat with chopsticks when I lived in America.
4. Did they (used to/ use to) work in a big factory before their retirement?
5. Peter (used to/ use to) drive to work but now he doesn't.
6. My younger brother didn't use (walk/ to walk) to school
7. My classmates didn't (used to/ use to) like me.
8. There (used to/ use to) be a lot of trees along this street.
9. Horse and cart used to (be/is) the main way of transportation.
10. Coffee didn't (used to use to) be my favorite drink.
11. Did Sarah (used to/ use to) be Mr Vu's student?
12. My grandmother (used to travel/use to travel) a lot before she got married.
13. Mr Ha(used to/ use to) work in Japan for 3 years.
14. I didn't (like used to/ use to like) reading books.
15. Did Jim and Jane (used to/ use to) hate each other?