DĐỀ1 A D A B A D A B A B B D B D C B C C D CC B C D A C D AĐỀ2 D D B B A C C D D B C A A B C C A D B BC A A D C B A DĐỀ3 C D B A A A B D C D D C B C B D A B C AD D B B A A C CĐỀ4 C B D C D C A B C B C C D B A D A C B AD A A B B A D D

28. A 28. D 28. C 28. DĐề1 A D A B A D A B A B B D B D C B C C D CC B C D A C D AĐề2 D D B B A C C D D B C A A B C C A D B BC A A D C B A DĐề3 C D B A A A B D C D D C B C B D A B C AD D B B A A C CĐề4 C B D C D C A B C B C C D B A D A C B AD A A B B A D D