Translation of English homophonic jokes

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

Before. The next day, when the teacher came into the classroom, he found the blackboard painted. He was very angry and asked, "Who did it? Please stand up! "It's me," Bob said. "Now, I can go home. Goodbye, sir. "

One day, after school, the teacher said to his students, "Tomorrow morning, if one of you can answer my question first, I will allow him or her to go home first." The next day, the teacher came into the classroom and found that the blackboard was painted in a mess. He was very angry and asked, "Who painted it?" Please stand up! "Bob said," Sir, it's me. Now I can go home. Goodbye! "

From the English joke website/a//a /a/Chinese/835.html