11. The subject I like most is Chemistry. = I… 12. It is three years since I started learning English. = I have…. 13. It is a week since she last met her mother. = She hasn’t….. 14. The last time we had a party was in June. = I haven’t.. 15. No one im my club is as generous as Mai. = Mai is…… 16. No member in my group is funnier than Dung. = Dung…. 17. Tuan is the most selfish in my team. = No one….. 18. My father is much older than my mother. = My mother…. 19. Mr . Phuong often drive to work. = Mr. Phuong …… 20. How many cities are there in Viet Nam? = How many