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C篇章大意：这是一篇说明文。文章主要说明了没有国家使用紫色来生产国旗的原因是紫色在过去很贵，因为紫色染料过去不常见而且很难生产，且介绍了人造紫色染料的发现。28.D.细节理解题。根据第一段"The answer is really quite simple.Purple wasjust far too expensive.";第二段的第三、四句"Purple's unique position comesfrom the rarity and high cost of the dye (used to produce it.""The dye wasfrom a small sea snail )that was only found in the Tyre area of theMediterranean."可知很贵的原因是原材料稀缺又生产难度大。29.D.细节理解题。结合段落语篇结构和写作方法，整个段落主要例举了两个例子来说明紫色染料的稀有和昂贵，即Queen Elizabeth/和Third century RomanEmperor Aurelio这两个例子。虽然例子中也解释了原因，段落有用到byexplaining cause and effect的方法，但是B的选项只是"分析结果或影响”，没有体现段落主要表达的原因，因此B是错误的。在段落中也用到了列数字，但是它不是题目要求的mainly developed,只是在两个例子中再用了部分的数字，因此，A也是错误的。根据以上分析，正确答案选D。30.C.推理判断题。根据ln1856,18-year-old English chemist William HenryPerkin by accident created a man-made purple dye while attempting toproduce an anti-malaria drug.He noticed that it could be used to dye cloth.Hepatented(s获得专利)the dye and mass-produced it.Therefore,everybody couldafford it,可以推理出C选项。31.A.主旨大意题：最佳标题。根据第一段"There are195 countries in the worldtoday but almost none of them have purple on their national flags.So what'swrong with purple?It's such a popular color today.The answer is really quitesimple.Purple was just far too expensive..(现在世界上有195个国家，但是几乎没有国家的国旗上有紫色。)"结合文章主要说明了不使用紫色来生产国旗的原因是紫色在过去很贵，因为紫色染料过去不常见而且很难生产，且介绍了人造紫色染料的发现。可知，A选项”没有紫色国旗？"最符合文章标题。故选A。
第二节参考范文could not believe my eyes.The beautiful piano I had been longing for wasstanding there in front of me.With my heart filled with excitement andhappiness,I couldn't help crying and tears streamed down my face.My motherapproached me,saying they knew the piano was the very thing I had dreamedabout and my father had tried everything possible to realize my dream.I was onthe point of saying something when the door opened.As soon as my father appeared,I hugged him tightly."Thank you,Dad!"Isaid.I could see a big smile on his wrinkled face.Regardless of the bad weather,my father had gone to work every day to make money.I could not imagine howmuch effort he had made!My father kissed me on the forehead,whispering thathe had at last earned enough to buy the piano.Only then did I realize that no giftcould measure up to a father's love.
