On Saturday morning, Roy and Jackson go fishing(钓鱼). Roy takes Bingo with him to the river. When the dog sees a butterfly(蝴蝶), he wants to run after it and tries to catch it. "All the fish are afraid and swim away!" says Jackson. "Be quiet! Bingo," Roy shouts(喊) at the dog. But Bingo doesn't listen to him.

"I think we have to go home now，Jackson. Next time, I will not bring him here again." "Wait!" says Jackson. "A fish isbiting my line." "Look out!" shouts Roy. But it is too late. Jackson falls into(掉入)the water. "Help! Help!" shouts Jackson. But Roy can't swim. Just then, Bingo comes out. Bingo jumps into the water and pulls(拉)Jackson onto the bank and saves his life.