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