阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项。
Gwondo was a trainer of dogs. He would go out every day with his dogs, to1 them how to catch animals so all his tribe(部落) could eat.
Wherever Gwondo went, his tribe could see him away in the distance 2 his white hair would shine in the sunlight. The tribe 3would say to their children, "See, there is Gwondo and his dogs, searching for 4 for us all. " Gwondo went out hunting every day and always came 5 with much food. And all were very happy.
Now Gwondo grew 6 and as all humans do, one day he died. The tribe felt sad and cried many days and many nights 7 one day the elders called to their children, " You have cried enough for Gwondo. Now it is time to 8 living. Go down to the beach and be happy."
The children ran down to the beach and looked out to sea. 9, they all looked at each other, then turned and ran back to their elders, 10, "Come quickly. Gwondo, he is back with us. He is out in the sea. "The elders hurried to the 11 and said, "Yes! It is Gwondo back! He is now a dolphin and lives in the sea. "
Now whenever you see 12 dolphins in the sea, look for the big old dolphin. You will know him because he has a large white fin on 13 back. He is Gwondo and he is training the young dolphins to chase(追逐) 14 close to the beach so that his tribe can catch them.
Gwondo is known to all the tribes 15 the east coast of Australia. They call him their sea dog.
