10 11-20 21-30 31-40 41-50 1-10 11-20 21-30 31-40 41-5...

Câu 1-10 11-20 21-30 31-40 41-50 1-10 11-20 21-30 31-40 41-50 1 C A D A B B C D A A 2 D C C B A C B B B D 3 D B D A A B D D D C 4 D B C A C B C C A B 5 A C D C B C A C B D 6 B A A D D A B B B B 7 B D D D B C B B A D 8 D A D B B D D A B B 9 A D D C A D D C A A 10 D D A D B C B A D C