Пожалуйста переведите в косвенную речь, срочно надо

1) He said that he had received letters from Ann.
2) I told them that I would make a change in our plan.
3) The old man told me that he had met her the day before.
4) Kate asked him how long he had stayed there.
5) Mr Smith asked her where his bag was.
6) Nina asked her friend whether he/she knew Vera's address.
7) Vera Ivanovna told Helen to look after her brother.
8) Miss Brooks said that Mr Brown was speaking over the phone then.
9) The boy told his sister not to open the window.
10) The son asked his mother whether they should go to the Zoo or not.

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