Преобразуйте вопросы в косвенную речь:11. My mother said to me: "Why

Преобразуйте вопросы в косвенную речь:

11. My mother said to me: "Why didn't you buy
bread?"
12. His friend asked: "How do you get to school?
13. Barry said to me: "How long have you been
waiting for your friend?"
14. She asked: "Who is singing in the next room?"
15. I asked my friend: "When did you telephone me"?