I didn't get used to be the best in class
Why didn't you get used to be the best? (общий тип)
In what you didn't get used to be the best? (специальный тип)
Who didn't get used to be the best in class? (вопрос к подлежащему)
Did you get or you didn't get used to be the best in class? (альтернативный тип)
You didn't get used to be the best in class, did you? (разделительный тип)