题目

完形填空 One Sunday afternoon，my younger brother and I were left alone at home. I was doing my homework while my younger brother was watching TV. Suddenly，the doorbell rang. My brother thought it was our parents，so he opened the  1  quickly. A tall man stood outside and asked politely if our parents were at home. Without thinking，my brother said，“No.” When I wanted to close the door，he suddenly  2  the door very hard and came into our house. He took out a  3  and ordered me to tie up my brother’s  4  with a rope（绳索）． I tied up his hands in a sp从集合中,任取5个数,组成新的集合,集合中第二大的数不小于6的概率为_________.