1. in: trong
=> in the world: trong thế giới
2. learn (v): học
3. for
=> for four years: trong 4 năm
4. different (adj): (+from): khác với
5. it
6. a (vì phía sau có "lot of")
7. best: tuyệt nhất
8. every (phía sau có "day")
=> every day: hàng ngày
Câu IV
1. My sister has learnt/learned English 5 years ago.
2. My cousin used to visit me when he lived in Hanoi
3. My friend asked me if I went to school on Sunday
4. The supermarket was built near the airport last year.
Câu V
1. I have live in this city for 15 years.
2. The telephone was invented many years ago.
3. Our children like watching/ like to watch cartoons on TV
4. Although Internet have lots of benefit, it's not only costly and time-consuming but also dangerous