B1A 2B 3C 4D 5D 6A 7B 8A 9A 10C11B 12D 13D 14B 15A 16D 17B 18C 19D 20...

Câu 40: Đáp án : B

1A 2B 3C 4D 5D 6A 7B 8A 9A 10C

11B 12D 13D 14B 15A 16D 17B 18C 19D 20D

21A 22C 23A 24C 25D 26B 27D 28D 29C 30B

31A 32B 33C 34C 35C 36A 37D 38B 39C 40B