Question

Bài này 2 trang ạ

Answer 1

10 B

11 B

12 D

13 A

14 C

15 D

16 B

17 A

18 B

19 A

20 A

Answer 2

^{_{10. B}}

^{_{11. B}}

^{_{12. D}}

^{_{13. A}}

^{_{14. C}}

^{_{15. D}}

^{_{16. B}}

^{_{17. A}}

^{_{18. B}}

^{_{19. A}}

^{_{20. A}}