What's your birthday, Ann? - It's ________. A. on the thirty-one of July B. on the thirty-first of July C. on July the thirty-one D. in July the thirty-firstĐoạn văn89/120What's your birthday, Ann? - It's ________. on the thirty-one of July on the thirty-first of July on July the thirty-one in July the thirty-firstGiải thíchĐáp án đúng là B