2 3 4 5 6 7 8 9 10C B D B A D A C C C11 12 13 14 15 16 17 18...

Câu 1 2 3 4 5 6 7 8 9 10C B D B A D A C C C11 12 13 14 15 16 17 18 19 20D C B C D B C B C B