i was listening to the radio when the telephone rang(改特殊疑问句）——　——　——　——　when the telephone rang ?the film was on half an hour ago.(改为同义句)the film ——　——　——for half an hour

i was listening to the radio when the telephone rang(改特殊疑问句）——　——　——　——　when the telephone rang ?the film was on half an hour ago.(改为同义句)the film ——　——　——for half an hour
i was listening to the radio when the telephone rang
(改特殊疑问句）——　——　——　——　when the telephone rang ?
the film was on half an hour ago.(改为同义句)
the film ——　——　——for half an hour

i was listening to the radio when the telephone rang(改特殊疑问句）——　——　——　——　when the telephone rang ?the film was on half an hour ago.(改为同义句)the film ——　——　——for half an hour

What were you doing

has been on