По complete the sentences with the correct forms of the verbs 1. when his mother returned home he already (to do) his home exercises. 2. asel liked to listen to pop-music when she be) younger. 3. she didn't sleep when her brother play) the piano.

1. When his mother returned home he had already done his home exercises.
2. Asel liked to listen to pop-music when she was younger.
3. She didn't sleep when her brother was playing the piano.