Change the voice of the following:
(1) It blankets them in silence.
(2) Bijju is calling to his sister.
(3) The mist affords a certain privacy.
(4) A school boy asked me to describe the hill-station.
(5)The rains have heralded the arrival of some seasonal visitors.
(6) A woman is chopping up sticks.
(7) We haven’t seen the sun for eight or nine days.