听力原文：/M: Mrs. Hobson, would you please describe some of things you do with aggressive children in this special school? F: Well, you must realize that when he comes here he is meeting other aggressive children, and aggressive children all together usually sum each other up. M: Uhum. F: And they find that aggressive here doesn' t pay off because you be jolly sure there' s one tougher and worse than he is. M: Uhum. F: So I usually, sometimes, have organized fights. M: Organized fights? You actually.. F: We have a ring and we have a bell. M: A boxing ring? F: Yes. They must conform, they must keep to the rules, and when they have either lost or won, we discuss after what it is to be the winner and what it is like to lose. And we carry on with our discussion and go on to what it is like in life. M: Umm. F: We must win or lose and we must do each very gracefully. M: Would you please describe some children you have had problems with? F: I had one boy who cut off his dog' s ear. M: Really? F: Yes. Then put a stone around his neck and drowned him. M: The dog? F: Yes, and there was another boy that used to attack me... /A particular way to deal with aggressive children is to ______.