Dưới đây là câu hoàn thành với cấu trúc "used to". Bạn có thể tham khảo:

1. I **used to go** to work by bus but now I drive my car to work.
2. Joe and I **used to like** each other but now we are friends.
3. Sue **used to fancy** rock music but now she is a fan of it.
4. My uncle **used to work** as a police officer before he retired.
5. Did you **used to catch** fireflies when you were a child?
6. I **used to play** tennis with my friends but now I am too busy to continue.
7. My father **used to smoke** a lot but he gave up three years ago.
8. My brother **used to do** the washing but now he wants to help my mom do it.
9. Jane **used to break** the speed limit and a police officer stopped her.
10. The Smiths **used to live** in the country but now they live and work in the city.
11. His doctor **used to be** famous but now everyone knows him.
12. My hometown **used to have** an amusement park but the authorities have opened a new area.

Hy vọng bạn thấy hữu ích!