Complete the sentences with the correct forms of the verbs.
1)When he came home he _______ (to read) an interesting story about the animals.
2)Kate entered the classroom when John ______ (to stand) at the blackboard
3)When his mother returned home he ______ already (to do) his home exercises
4)Asel liked to listen to pop-music when she _______ (to be) younger.
5)She didnt  sleep when her brother ____ (to play) the piano.
6)When she came to his home she not ______ (to know) that he ____ (to leave) for Astana