Переведите в косвенную речь: 1)Our teacher said,"Thackeray's novel are very interesting...

Question

Переведите в косвенную речь:
1)Our teacher said,"Thackeray's novel are very interesting ."
2)Ann said to us,"They haven't come yet."
3)Nina asked her friend,"What did the professor speak about in his lecture?"
4)She said to me,"Have you sent them an e-mail yesterday?"
5)"Do you often meet my sister at the library?" He asked me.

Answer 1

Our teacher said that Thackeray's novel were very interesting
Ann said to us that They had not come yet
Nina asked her friend that  What had the professor spoken about in his lecture
She said to me Had you sent them an e-mail yesterday                          was you often met my sister at the library? He asked me   
только в последнем неуверенна