【单选题】How could they ______ that the police officer had punched the suspect without knowing the facts?
【单选题】The doctor explained to the police officer that it was too dangerous to ______ the bullet from his backbone.
【单选题】The police officer told his men to pay more attentionto the man who _______ at the entrance of the hall with a package under hisarm.
【单选题】The police officer thoroughly ______ the cause of the accident, but they couldn't find any trace.
【单选题】The police officer is determining who is going to be responsible()the traffic accident.
【单选题】The police officer asked the children in the street.