Đáp án tham khảo có thể sai: 1c, 2d, 3b, 4a, 5c, 6c, 7a, 8b, 9c, 10c, 11a, 12c, 13c, 14c, 15c, 16c, 17c, 18c, 19c, 20c, 21c, 22c, 23a, 24a, 25a, 26b, 27c, 28d, 29c, 30c, 31a, 32a, 33b, 34c, 35c, 36d, 37c, 38c, 39f, 40a, 41a, 42b, 43a, 44d, 45a, 46c, 47c, 48c, 49e, 50f, 51c, 52b, 53c, 54b, 55a...