下面短文中有10处错误。请在有错误的地方增加、删除或修改某个单词。
增加：在缺词处加上一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1 每处错误及其修改均仅限一词。
2 只允许修改10处，多者（从第11处起）不记分。
Liu Kai is a good student and always ready for help others. One day on his way to school, he
saw little girl crossed the road. A car was coming towards him quickly and the girl was very frightened to move. Just now Liu Kai rushed up to her and caught her on the arm. The little girl was saved. She told him where she lived in, and he took her home. When Liu Kai hurried into the classroom, the teacher has already begun his lesson. He told the teacher why he was late. He was then praised for which he had done.