Bài 3: 
2. What is the best day of the week? 
3. Where is the most expensive shop in town? 
4. What is most interesting show on TV? 
Bai 4: 
1. fast -> faster 
2. most -> bỏ 
3. most good -> best
4. uglyer -> uglier 
5. worse -> worst 
Bai 5: 
1. the best 
2. farther
3. faster
4. more expensive
5. the biggest
6. the oldest 
7. the most famous
8. younger 
9. moderner
10. happier
11. the most interesting 
12. larger