Найдите ошибку в предложении: 1. once upon a time it was a king, who liked new clothes. 2. you don't have to ask a lady her age.it isn't polite. 3. will be he happy to get such a ball.

1. Once upon a time there was a king, who liked new clothes.
2. You mustn't ask a lady her age.It isn't polite.
3. He will be happy to get such a ball.