It was two in the night.xiao ming was sleeping.Suddently he heard someone was breaking into his room.He was frighted ,pick up his telephone and called "110".Immeidntly the police drove and came to xiaoming*s house.But the police did not find any robber,so they criticized xiaoming.they told xiaoming that it is wrong to call police if there is no robber or thief.Xiao ming is very disappointed and regretful.