Đáp án tham khảo có thể sai: 1a, 2d, 3a, 4c, 5c, 6d, 7a, 8c, 9a, 10d, 11c, 12a, 13a, 14c, 15c, 16d, 17d, 18a, 19b, 20b, 21a, 22c, 23c, 24d, 25d, 26c, 27a, 28c, 31b, 32b, 33d, 34d, 36c, 37c, 38c, 39c, 40d, 41a, 43a, 44c, 45c, 46a, 47d, 48d, 49ace, 50c, source : IAO202_SP24_B10W_FE_187991