根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整。
   My 14-year-old brother John and I saw the coat at the same time. The thick black woolen coat was soft, and it cost only ＄28. We looked at each other, saying n____ , but John’s face was shining with joy. Dark woolen coats were p____  with boys just then, and could cost several hundred dollars. But this coat was even better and m____  cheaper.
   John t____  on the coat and bought it at once. John wore the coat to school the next day and came home with a big smile. “H____  did the kids like your coat?” I asked. “They loved it,” he said. I started c____  him “Lord (老爷) John”.
   A few weeks later , something good h____  to John. He became more polite, more helpful and more pleasing. He was willing to lend his classmates his pens; he was willing to bring his father a cup of tea when he got home; he was willing to help a blind man c____  the road.
   When my mother told this to one of his teachers, he said, “It must be his coat!” One day, in the library, my brother and I ran into a friend. “Could this be John?” he asked. John shook hands with him, l____  a gentleman(绅士)!
   I think John changed b____   of his own attitude(态度). If you think you are a gentleman or a lady, you can become a perfect one.

曾经震惊世界的日本水俣病是人误吃了被甲基汞污染的鱼所引起的．经检测，水俣湾海水中甲基汞含量最高为0.00017mg/L．设当地海水中生活着A、B、C、D四种生物，由于海水被污染，生物体内残存甲基汞的含量如下表所示：

请分析表中信息，并回答问题：

【历史上重大改革回眸】阅读材料，回答问题

材料：在张居正看来，“致理之道，莫急于安民生；安民之要，惟在核吏治”“今国家要务，惟在遵守祖宗旧制”，应以“守成业而致盛治”为目标。首先，他从整顿吏治开始，创制考成法，严格定期考察各级官吏贯彻朝廷诏旨的情况（时间、费用），以决定赏罚升降，并“以钱谷为考成”。……起用戚继光等著名边将，并大力增修、加固长城，广开边市，使汉蒙边防安宁，贸易活跃，每年节省了不下百万的军费。并下令，清查天下田亩，以“均田税足民”，并把田赋、徭役等合为一条后一律征银……还下令拆毁各地书院，禁止讲学……然而，1582年张居正独揽国事10年之后，溘然长逝，改革初见成效，便被统治阶级喊停。