阅读下面材料， 在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
David was eating something at home _____ he received a strange phone call from a hospital.The caller said that his son had fallen to ground unconscious on the way to school.It was he _took him to the hospital.David hung up his cell phone and rushed to his son’s classroom, only ____(find) him listening to the teacher attentively.He suddenly realized that he had been cheated.Just at that time the phone _____ (ring) again, saying, “ Your son is __ (terrible) injured and he needs _______ immediate operation which costs 48000 yuan.The doctors here say they will not operate_____your son until they receive the money.” When __( ask) from where the caller had taken his son to hospital, the caller rang off.
If the cheater thought he could get money from David in such a _____(honest) way, he was wrong.Such phone calls are common these days.Some parents might have fallen victims to such tricks.Most of the parents are sensitive to ______.It was really silly to cheat well-educated men like David.