1. polluted

2. expensive

3. fantastic

4. modern

5. boring

6. noisy

7. narrow 

8. fast

9. suburb

10. peaceful

II. GRAMMAR

I. 

1. narrow > narrower

2. historic > more historic

3. polluted > more polluted

4. short > shorter

5. good > better

6. boring > more boring

7. peaceful > more peaceful

8. crowded > more crowded

9. bad > worse

10. modern > more modern

11. fast > faster 

12. cheap > cheaper

13. convenient > more convenient

14. noisy > noisier

15. heavy > heavier

Đó là toàn bộ đáp án

Chúc bạn học tốt

( Cho mik xin trả lời hay nhất, 5 sao và cảm ơn nha )