Ответ:

5.

1) the highest

2) the biggest

3) the most beautiful

4) the best

5) the easiest

6) the most popular

6.

1) the fastest

2) bigger

3) the most beautiful

4) better

5)the longest

6) more interesting

7.

1) not as big as

2) as tall as

3) not as good as

4) not as high as

5) as beautiful as

6) not as warm

8.

1) too

2) enough

3) not enough

4) too

5) not warm enough

6) too

Если понравился ответ, сделай его лучшим, пожалуйста :)