When Tom was an eight-year-old boy, he went to school near his house. He always went there and came home on foot, and he usually got back on time. But last Friday he came home from school late. His mother was in the kitchen. She saw him and said to him. " Why are you so late today, Tom? ” “ My teacher was angry and sent me to the headmaster after our lessons." Tom answered. "To the headmaster?"His mother said, "Why did she send you to him? ” "Because she asked a question in the class, " Tom said, and nobody in our class gave her the answer except me. ” His mother was angry, "But why did the teacher send you to the headmaster then? Why didn't she send the other children to the headmaster? " She asked Tom. “ Because her question was, "Who put glue on my chair? ”