Вопрос из теста по предмету Английский язык

Question

Преобразуйте прямую речь в косвенную
“When did you learn to swim?”
My mother asked Helen.

Answer

My mother asked Helen when she had learnt to swim.

Answer

My mother asked Helen when you had learnt to swim.

Answer

My mother asked Helen when did she learn to swim.

Answer

My mother asked Helen when she learnt to swim.

Преобразуйте прямую речь в косвенную “When did you learn to swim” My mother asked Helen.: ответ на тест 605159 - Английский язык