Choose the right forms to complete the sentences. 1 when my telephone (rang/was ringing), i (watched/was watching) my favourite tv programme. 2 my friend and i (danced/were dansing ) while my sister (played/was playing) the piano 3 while mr brown (drove/was driving) home, his family (worked/were working) in the garden 4 when the lesson began, all the pupils (sat/were sitting) at their daesks. 5 john (rode/was riding) in the park when he (saw/ was seeing) his friend sam.