=>
III/
1. quieter
2. stronger
3. more interesting
4. more difficult
5. worse
IV/
3. more and more nervous
4. worse and worse
5. more and more talkative
V/
1. The older he grows, the more intelligent he becomes.
2. The nearer we sit to the stage, the more clearly we can see.
3. The hotter it is, the more miserable I feel.
4. The farther we live from our house, the more we miss it.
5. The more popular television programmes become, the worse they seem.