Martin is six years old. He is a student of Grade One. His home is not far from the school, so he goes to school and comes home on foot. He usually goes home from school at a quarter past five, but today he is late. His mother asks him, “Why are you late today, Martin?” “Miss Green is very angry. She sends(送) me to the headmaster(校长) after school,” Martin answers. “What? Why does she send you to the headmaster?” Mum asks. “Because she asks a question, nobody can answer but I can.” Mum is angry, “Why does she send you, then? Why doesn’t she send your stupid(愚蠢的) classmates?” “Because her question is ' who puts glue on my chair?'” Martin answers.