One day after school the teacher said to his students, "Tomorrow morning, if any one of you can answer my first question, I will permit him or her to go home
earlier."

The next day, when the teacher came into the classroom, he found the blackboard daubed（涂抹） . He was very angry and asked, "Who did it? Please stand up!" "It's me," said Bob, "Now, I can go home. Good-bye, Sir." 

一天，放学以后，老师对他的学生们说：“明天上午，如果你们当中的任何一个同学能首先回答我的问题，我就准许他或她最先回家。”

第二天，老师走进教室时发现黑板被涂得乱七八糟，他非常生气的问：“谁涂的？请站起来！”鲍勃说：“先生，是我，现在我可以回家了，再见！”