Đáp án tham khảo, có thể sai: 1c, 2a, 3d, 4c, 5a, 6c, 7d, 9a, 10d, 11d, 12c, 13a, 14d, 15d, 16a, 17a, 18c, 20b, 21a, 22b, 23b, 24c, 25a, 26d, 27b, 28c, 29a, 30a, 31c, 32b, 33b, 34d, 35c, 36b, 37b, 38a, 39b, 40b, 41c, 42b, 43a, 44a, 45c, 46a, 47b, 48a, 49a, 50b, 51d, 52a, 53a, 54b, 55b, 56c, 57d...