未决赔款准备金的估算方法有（）。A．逐案估计法 B．平均值估计法 C．赔付率法

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　　小题1:A little boy loved to play around the tree.
Time went by. The boy grew up. One day, he came back to the tree and said, “小题2:” “You can pick my apples and sell them,” the tree said. Then the boy took all the apples, but he disappeared for a long time.
小题3: “Come and play with me,” the tree said. “I don’t have time to play. I have to work for my family. We need a house,” the boy replied. “You can cut my branches(树枝) to build a house,” said the tree. So the boy cut all the branches off and left happily. But the tree didn’t hear from the boy for a long time.
小题4:The tree said, “Sorry, I don’t have anything for you now.” “I am tired. I just need a place to rest,” the boy replied. “Good! Old tree roots(根) are the best place to rest,” said the tree. The boy sat down and the tree was glad and smiled with tears.
In fact, the tree stands for our parents. 小题5:

A. Finally, the boy returned after many years. B. A long time ago, there was an apple tree. C. As the apple tree, they give us everything we need. D. One day, the boy returned and the tree was very excited. E. I want to play with toys, but I need money to buy them.