13. d

14. b

15. c

16, d

17. b (middle name: tên đệm)

18. c

19. d

20. b

2/

1. C. goodest → best

2. B. many → much

3. A. lives at → lives on

4. B. much → many

5. C. beautifuler → more beautiful

6. C. middle → family

7. A. How many → Which

8. D. by foot → on foot

9. C. full → 0 (Nếu từ "Nguyen" là "Nguyên)

C. full → family (Nếu từ "Nguyen" là "Nguyễn")

10. A. What → Why

11. C. much → many

12. A. I doing → I am doing

13. A. is → are

13. d

14. b

15. c

18. c

20. b

Ex.2

1. goodest -> best

2. many -> much

3. at -> in

4. much -> many

5. beautifuler -> more beautiful

6. middle -> family

7. How many -> Which

8. by -> on

9. full -> family

10. What -> Why

11. much -> many

12. I am doing

13. is -> are

14. on -> at