完形填空(专项练习)( A )My grandfather was a teacher. He was the headmaster of a school for boys 1 the age of thirteen and eighteen. He was very strict with the boys but kind 2 , because when I was young , he usually gave me nice things, told me interesting stories. But I believe that the boys at his school were 3 of him.At school, when he 4 a room full of noisy boys, there was 5 at once. When he looked at a boy, that boy 6 red in the face, and looked down at his shoes. If a boy didn