Đáp án:

I,

1.best

2.happinest

3.faster

4.more colorful

5.better

6.good

7.least

8.prettier

9.the best

10.the sicker

II,

1.as pretty

2.more expensive

3.more important

4.the best

5.more happy

6.international

7.stronger

8.more comfortable

9.better

10.most delightful

11.most carefully

12.more interesting

13.more precious

14.warmer

15.as well

16.more pleasant

17.the highest

18.stronger

19.fatter

20.the largest

III,

1/ It is 3 degrees lower than yesterday.

2/ It take four hours going by car and five hours going by train.

4/ Jane'sister cooks not as well as her.

5/ Nobody in this team plays football better than Peter.