II.Choose the correct answers

1.A

2.B

3.D

4.B

5.C

6.D

7.A

8.C

9.C

10.D

III.Write the comparative forms

1.strong - stronger

2.crowded - more crowded

3.tall - taller

4.noisy - noisier 

5.pretty -  prettier 

6.happy - happier

7.short - shorter

8.big - bigger

9.modern - more modern

10.friendly - friendlier 

11.good - better 

12.bad - worse 

IV. 

1.more comfortable

2.larger 

3.more important

4.heavier

5.more difficult

6.longer

7.more intelligent

8.better

9.worse 

10.more beautiful

11.prettier 

12.stronger

V.

1.I am thinner than my brother.

2.A mouse is smaller than a cat.

3.A radio is cheaper than a television.

4.The sun is bigger than the moon.

5.A sea is larger than a lake.

6.My children are more intelligent than yours.

7.Your house is more convenient than my house.

8.Your English is better than mine.

9.My father is older than uncle Hung.

10.I am taller than my mother.

11.Summer is hotter than winter.

12.A house in the city is more expensive than a house in the country.

VI.

1.Rome is older than London.

2.London is bigger than Rome in area and population.

3.No, it isn't.

4.Rome has got more rain.

5.Rome is nearer the sea than London.