Đáp án tham khảo có thể sai: 1c, 2a, 3c, 4a, 5a, 6d, 7c, 8d, 9a, 10a, 11a, 12b, 13c, 14b, 15a, 16d, 17a, 18b, 19c, 20a, 21c, 22a, 23a, 24c, 25a, 26a, 27d, 28d, 29a, 30a, 31b, 32c, 33c, 34a, 35a, 36d, 37a, 38a, 39a, 40c, 41a, 42b, 43e, 44a, 45a, 46c, 47a, 48d, 49a, 50a, source : MAS202_RE_SU23_473871