下面短文中共有10个错误, 请找出并按要求在文中标记并改正在短文下的横线上。
如多一个词：把多余的词用斜线（／）划掉, 在短文下边横线上写出该词, 并也用斜线划掉。
如缺一个词：在缺词处加一个漏字符号（∧）, 在短文下边横线上写出该加的词。
如错一个词：在错的词下划一横线, 在短文下边横线上写出改正后的词。
My grandfather was a teacher. He was the head teacher of a school for boys at the ages of thirteen and eighteen. I know that he was a kind man, because when I am young, he gave me presents, and set me on his knees, and told me stories. And the boys at his school were afraid of him. At school, when he walked into a room full of noise boys, there was silence at once. When he looked at a boy with a certain look in his eye, that boy went red in the face, and looked down his shoes. If a boy brought to him careless work, my grandfather picked up a boy's book and threw it across the room, shouting，“Do it all again, and take it back in the morning！” If the boy was later, or if he forgot to take the work, he had to do it again.at →between
网友回答
(答案→)at →between
解析：本文叙述作者的爷爷是某校的一位老师，他在家里是慈祥的爷爷，可在学校可是一位严厉的老师，文中举例说明爷爷在学校是如何对待那些不听话的学生的。
【小题1】考查介词。表示在两者期间用between…and…,故用between.
【小题2】考查动词的时态。当作者小的时候，当然要用过去式，故用was.
【小题3】考查连词。and表示前后是顺承关系，but表示前后是转折关系。
【小题4】考查形容词。Noise是名词；noisy是形容词，修饰名词。
【小题5】考查名词。眼睛是两只眼睛用复数eyes.
【小题6】考查固定短语。look down at向下看。
【小题7】考查固定短语。bring sb sth给某人带来某物。
【小题8】考查冠词。a表示泛指；the表示特指。这里特指那个男孩。
【小题9】考查动词。take表示带走；bring 表示带来。
【小题10】考查副词。Later后来；late迟到。