wdu203

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