Ответ:

I 1. The happiest

2. More famous

3. The most clever

4. Dirty - dirtier - the dirtiest

5. Bad - worse - the worst

II 1 Leaves

2. Teeth

3. Photos

4. Secretaries

III 1. Are, us

2. Will be, them

3. Was, your

4. Was, mine

5. Will be

Объяснение: