=>
1. B used to stay
2. D did not use to believe
3. B used to be thought
4. D both B and C
5. D to working
6. A used to read
7. B used to driving
8. A doesn't any more
9. A am used to living
10. B used to work
11. C am used to working
12. D used to have
13. A used to think
Dạng trên về used to :
(+) used to V : đã từng làm gì
(-) didn't use to V
be used to Ving/get used to Ving : quen làm gì
