XII.
1. was
2. listened/ was
3. didn't used to
4. Do...used to
5. took
IX.
1. at/ at
2. on/ at
3. in/ at
4. at
5. at
6. in/ in
7. In
8. on
9. on/ on
10. on/ on
X. câu 1, 2 bạn làm đúng rồi
3. is used to working
4. (sao mình ko thấy dấu ngoặc?)
5. used to have
XI.
1. am used to think
2. used to take
3. used to take
4. didn't use to see
5. used to
XII. 1C 2C 3B 4C 5A
Xin câu trả lời hay nhất và 5* ạ!