补全对话。 (从方框里选择合适的句子补全对话)。 A: Come here, Panos! Look! There's a box near the big tree. B: 1______ A: 2______ I think there are some books. B: No, I think there's a football. A: 3______ B: Ah, there's a football and some books. A: Oh! 4______ B: It's Tom's. Let's find him and give him the box. A: Great! 5______ A: What's in it? B: There's a name on the box. C: Let's go and open it. D: Let's go. E: I don't know.