阅读理解。根据短文内容，回答下列问题。
Little Peter is a boy of nine. He began to go to school the year before last year and now he's in Grade Three. He lives not far from the school but he is often late for class. He likes watching TV in the evening and goes to bed late, so he can't get up early in the morning.
This term Mrs black, Peter's aunt, works in Peter's school. She teaches Grade Three English. She is strict with Peter and often tells the boy to obey the school rules and come to school on time.
Yesterday morning Peter got up late. When he got to school, it was ten past eight. His aunt was waiting for him at the school gate.
"You're ten minutes late for the first class, Peter," Mrs Black said angrily. "Why are you often late for school?"
Every time when I get to the street corner, I see a board. It says ‘SCHOOL—GO—SLOW!'"