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Tommy and John were hot and sweatty as they sat outside the principal's office. They had dirt smeared on both of their faces, and they could hear their teacher give an account of what happened to the principal. Tommy sneered at John and John returned his angry glare. As the teacher left the office, they hung their heads to keep from looking at their teacher.
What inference can you make about those boys and their teacher?
What is "they disappointed their teacher"?