5. farther
7. the noisiest
9. the nearest
10. the most interesting
2/
1. the most liveable
2. cheaper
3. the best
4. as reasonable as
5. the worst
6. luckier
7. the least
8. as quietly as
9. farther
10. most popular
3/
1. as interesting as this one
2. the noisiest student in the school
3. read a less interesting book than this one before
4. city in Viet Nam is more liveable than Vung Tau City
5. changed since the 1990s