1. You didn't have to clean the car
2. She has lived in the countryside for 5 years ( hình như đề sai, đúng thì đổi she thành uncle tom)
3. It was the mail that my secretary sent tom Mr. David 3 days ago
4. Our decision to sell my ancient house was a difficult one to make
5. It was on Nguyen Trai Street that he bought two houses
6. I'm determined to get the best result in the exam
7. We were very impressed by her effort to overcome difficulties
8. We must do well at school
9. You should spend more time talking with your children
10. John mustn't use that computer
11. It was their hous warming that they celebrated yesterday
12. It is English that is used all over the world
13. Hes has been learning English since he was in grade 6
14. John started playing piano 10 years ago
15. She admitted having taken the necklace
16. I regret having sold my car
17. We last scored a goal 2 months ago
18. She has lived in the countryside since she was 5 years old
