Fred is seven. He goes to school every day. The school is not far his home. So he goes to school foot and comes back on time. But today he comes back late. His mother asks him, "Why are you late today?"
"I'm in the teacher's office."
"Why do you go to the teacher's office?"
"Because my teacher asks us question in class, nobody can answer it, I can."
"You are great! And what question?"
" puts ink(墨水) on my chair?" Fred answers.
