CHRONOLOGICA ——The Unbelievable Years that Defined History DID YOU KNOW.... In 105 AD paper was inve

21. C    22. B    23. C
【解析】
这是一篇应用文。文章主要从多方面介绍了CHRONOLOGICA这本书的特点。
【21题详解】
细节理解题。根据最后一段中“This complete but brief historical collection is certain to entertain readers young and old, and guaranteed to present even the biggest history lover with something new!”这本完整而简短的历史典藏一定会让老少读者感到愉悦，并保证向最忠实的历史爱好者呈现一些新的东西!可知CHRONOLOGICA是一本历史书。故选C项。
【22题详解】
推理判断题。根据第二段中“Travel through 100 of the most unbelievable years in world history and learn why being a Roman Emperor wasn’t always as good as it sounds” 穿越世界历史上最令人难以置信的100年，了解一下为什么罗马皇帝并不像听起来那么好。以及第三段中“While CHRONOLOGICA tells the stories of famous people in history such as Thomas Edison and Alexander the Great, this book also gives an account of the lives of lesser-known individuals including the explorer Mungo Park and sculptor Gutzon Borglum.” CHRONOLOGICA讲述了Thomas Edison和Alexander the Great等历史名人的故事，同时该书还介绍了探险家Mungo Park和雕塑家Gutzon Borglum等鲜为人知的人的生活。可知作者是通过介绍书里的内容，向读者推荐这本书的。故选B项。
【23题详解】
推理判断题。根据第三段中“CHRONOLOGICA is an informative and amusing tour into history, beautifully illustrated and full of unbelievable facts.” CHRONOLOGICA是一次充满历史意义的有趣旅行，其插图精美，且充满令人难以置信的事实。可知，这本书有助于弄清楚一些历史事实。故选C项。