It is Sunday morning. The weather i

It is Sunday morning. The weather is fine. David and his friends don't go to school. They go swimming in a river. His three friends catch one fish after another. David doesn't catch anything.Half an hour later, David has an idea. He goes to a fish shop and buys a big fish. Then he goes back to the river. He puts the hook(鱼钩) into the fish's mouth and throw the fish into the river. His three friends don't know what about this. They all have own work to do. In a few minutes, David shouts. "What a fish I catch at last!" His friends are very when they see David pulling a big fish out the water. They ask him how he can catch such a big fish. David says nothing but only smiles.