下列有关金属资源的利用和保护不合理的是（　　）

    One fine afternoon, I was walking along Fifth Street when I remembered that it was necessary to buy a pair of socks. Why I wished to buy only one pair was unimportant. I turned into the first sock shop that caught my eye. A boy clerk, who could not have been more than seventeen years old came forward. “What can I do for you, sir?” he said. “I wish to buy a pair of socks.” I replied.

    His eyes shone. There was a note of excitement in his voice. “Did you know that you had come into the finest place in the world to buy socks?” I had no idea of that, as my entrance had been accidental. “Come with me,” said the boy, eagerly. I followed him to the back of the shop, and he began to pull down box after box from the shelves, showing their contents（内装物）for my choice.

    “Hold on, lad,” I said, “I am going to buy only one pair!” “I know that,” said he, “but I want you to see how beautiful these are. Aren't they wonderful!” There was on his face an expression of seriousness and pride and delight as if he were showing me the secrets of his religion（宗教信仰）. I became far more interested in him than in the socks. I looked at him in surprise. “My friend,” said I, “if you can keep this up, if this is not merely from having a new job, if you can keep up this high spirit and excitement day after day, in ten years you will own every sock in the United States.”

课内阅读。

   “琳达，”爸爸坐到我身边，平静地说，“一个人所能给予他人的最珍贵的东西，莫过于自己身体的一部分。很久以前，你妈妈和我就认为，如果我们死后的身体能有助于他人恢复健康，我们的死就是有意义的。”原来，他和妈妈早已决定死后捐赠器官了。