Ответ:
N1

1 the highest
2 the biggest
3 the most beautiful
4 the best
5 the easiest
6 the most popular

N2
1 the fastest
2 bigger
3 the most beautiful
4 better
5 the longest
6 more interesting

N3
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 as

Объяснение:

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. more bigger

3. the biggest

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 as