帮忙改成被动语态Four powerful bombs hot central LOndon during this m
帮忙改成被动语态
Four powerful bombs hot central LOndon during this morning's rush hour.Three exploded on London.Underground lines and another on a bus.NO one has yet discovered who is responsible for the incidents but police are already collecting evidence.They have that they can find an explanation for the attacks.希望大家能帮我将上面着这篇文章改成被动语态,