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BJack’s mother tells Jack and his brother John to clean their yard. John goes to his room and tells Jack to clean the yard. Jack cleans the yard. One hour later, his brother comes out. John brings something like a vacuum(真空吸尘器). Jack looks at John and asks, “What is this?” John says, “It is Toratazaloo. It is a great invention. We can use it to clean the yard or house.” Jack watches John when he uses his invention, but it doesn’t work. John looks at it and checks it. One hour later, John uses his invention to clean their yard. The yard is clean. Jack says, “John, you are so great!” They are very happy. The two boys tell that to their parents. They are surprised.