4.

1.bigger

2.more beautiful

3.highest

4.the deepest

5.the worst

6.longer

7. better

8.more expensive

9.the highest

10.more intelligent

11.older

12.larger

13.the cleverest 

14.more boring

15.more narrow

16.busier

17.the closest 

18.quieter

19.more ambitious

20.more colourful

5.

1.heavier

2.younger

3.bigger

4.more excite

5.more valuable

6.larger

6.

1.her new house is smaller than her old house.

2.the white dress is cheaper than the black dress.

3.according to me,maths is harder than english.

4.mary is the most intelligent in my group.

5.The nile is the longest river in the world.

6. No mountain in the world is higher than Mount Everest.

7.The english test is more difficult than i had thought.

8.it is noisier in the city than the country.

9.my new sofa is more comfortable than my old sofa.

b4

1.bigger 

2.more beautiful 

3.the highest 

4.the deepest

5.the worst

6.longer

7.better

8.more expensive

9.the highest 

10.more intelligent

11.older

12.larger

13.most clever

14.more boring

15.narrower

16.busier

17.closer

18.quiter

19.more ambitious 

20.more colorful 

b5b6 dài quá mik ko làm hết

cbht