3.
1.bigger.2.funnier.3.more interesting.4.better.5.sunnier.6.older.7.hotter.8.more expensive
4.
1. It's hotter Rome than in Paris. 2. Phill tells jokes funnier than Mark. 3. Sports programms are more interesting than reality programs.
5.
1. The coldest. 2. The funniest. 3. The longest. 4. The hottest. 5. The tallest. 6. The most difficult
6.
1. The theatre is as boring as the cinema. 2. The Internet is as important as TV. 3. Maths isn't as difficult as English. 4. Watching TV isn' as intersting as reading. 5. Bascetball isn't as easy as football. 6. Classical music is as cool as pop music.