t nghi la 11a 13c a

6, D

7, C

8, B

9, A

10, C

11, A

12, B

13, C

14, A

15, B

16, C

17, D

18, A

19, C

20, A

21, C

22, D

23, B

24, A

25, C

26, D

27, B

C - B - B - D - B - A - D - A - C - D

b - d - a - d - c

The book which is my birthday present is very interesting

My bike was repaired by my brother yesterday

d - a - d - b - c - b - a - d - b - a - c - a - b - d - c

a - a - c - d

c - b - d - a - d - c - c - c - a - b

a - d - a - d 

b - c - b - c