3, Iron is harder than stone.

4, No one in the team is the better player than Tom.

5, He plays guitar better than I do.

6, My sister is the tallest student in the class.

7, HCM city is the largest city in Vietnam.

8, This is the most interesting story that I have ever heard.

9, My mother cooks better than my father does.

10, My sister is the tallest student in the class.

11, I have never tasted a more delicious cake than this one.

12, Gorge is the most dependable person that I have met.

13, Your mother is the most kind-hearted person.

14, Mr. John is the best teacher in this school.

15, Is this the biggest that you have got?

16, He is the tallest person I know.

17, In London, summer nights are much colder than in Cairo.

18, Not as many people die from flu as 50 years ago.

19, More rain is in Tokyo than in Athens in January

20, The population of Korea is more than that of Taiwan.