Đáp án tham khảo có thể sai: 1a, 2a, 3b, 4c, 5a, 6d, 7d, 8d, 9d, 10b, 11c, 12b, 13c, 14a, 15d, 16c, 17b, 18a, 19d, 20d, 21b, 22d, 23c, 24a, 25c, 26a, 27b, 28a, 29c, 30b, 31c, 32c, 33d, 34a, 35b, 36a, 37a, 38c, 39b, 40c, 41d, 42a, 43b, 44a, 45a, 46d, 47b, 48a, 49d, 50b, source : VNR202_SP24_RE_399582