1) When he came home he was reading an interesting story about the animals.
2) Kate entered the classroom when John was standing at the blackboard.
3) When his mother returned home he had already done his home exercises.
4) Asel liked to listen to pop-music when she was younger.
5) She didn't sleep when her brother was playing the piano.
6) When she came to his home she didn't know that he had left for Astana.
7) Aidar told us that he had invited us to his birthday party in January.
8) My sister promised that she would finish her work in two days.
9) He asked me if I had lived in Paris 2 years before.
2)kate entered the classroom when John WAS STANDING at the blackboard.
3)when his mother returned home he HAD already DONE his home exercises.
4)Asel liked to listen to pop-music when she WAS younger.
5)she didnt sleep when her brother WAS PLAYING/PLAYED the piano
6)When she came to his home she DIDN'T KNOW that he HAD LEFT (как вариант можно еще was leaving) for Astana
7)Aidar told us that he HAS INVITED us to his birthday party in January.
8) My sister promised that she WILL HAVE FINISHED her work in two days.
9) He asked me if I LIVED in Paris 2 years before.