根据短文内容选择。One morning a fox sees a rooster. He thinks, "This is my breakfast." He comes up to the rooster and says, "I know you can sing. Can you sing for me? " The rooster is happy. He closes his eyes and sings. The fox catches (抓住) him in his mouth. The people in the field see the fox. They shout, "Look, look! The fox is carrying the rooster away." The rooster says to the fox, "Mr Fox, the people say you are carrying their rooster away. Tell them I'm yours. Not theirs." The fox opens his mouth and says, "The rooster is mine, not yours." Just then the rooster runs away and jumps onto the tree.