5 задание
1. cleaner, 2. colder, 3. the most expensive, 4. worse, 5. longer, 6. better, 7. more polite, 8. the oldest, 9. more intellegent, 10. the highest.
6 задание
1. the biggest building, 2. the most strange person, 3. narrower, 4. the oldest, 5. the worst, 6. better, 7. more cheerful, 8. longer, 9. more difficult, 10. the easiest, 11. harder.