<正>重点词汇1.paper n.纸;纸张paper表示"纸;纸张"时,是不可数名词。a piece of paper一张纸拓展(1)paper可作定语,如:paper money纸币。(2)paper意为"试卷;论文"时,是可数名词。Please hand out the papers.请分发试卷。2.pollute v.污染Did it pollute the environment?它对环境有污染吗?拓展(1)pollution n.污染;污染物air/noise pollution空气/噪音污染