24. The continent in the world is Antarctica. C.coldest A. most coldest B. colder D.most cold 25. I him for three months, and now we are best friends. A. have known B. am knowing C. knew D.know 26. She to South America before, so she wants to visit it. B. wasn't A. has ever been C.has never been D.was 27. They are among people I have ever met. A. more friendly B. most friendly C. friendliest D. the most friend 28. How many cities in Viet Nam up to now? A. do you visit B. have you visited C. were you visited D.did you visit 29. Cities can provide_ health and education services. A. most the convenient B. the most convenient C. most convenient D. the best convenient 30. It's not coffee, but tea is drink in Britain. A. more popular B. most popular C. more popular than D. the most popular mình cần gấp ét o ét