六、阅读下面的短文,用方框中所给词的适当形式填空,使文意通顺,结构正确。(每个单词限用一次)
publish,century,color,page,find,although,invent,until,knowledge,visit
Woodblock printing was probably invented in the 7th 1. in China. The earliest book that we have was 2. in 868 and was found in a Dunhuang cave. Woodblock printing took a long time because a new block was needed for every 3. in a book. By the 11th century, printed books could be 4. all over China. They included books of Confucian thoughts, dictionaries, and books on maths. In 1340,books could be printed using two 5. ,black and red. 6. the Chinese learned about printing so early,printing was not introduced in other parts of the world for hundreds of years. It is thought that when the great Italian traveler Marco Polo 7. China in the 13th century,he saw printed books. It is possible that Marco Polo brought the 8. to Europe. But printed books did not come to Europe 9. 1450 when a German called Johannes Gutenberg 10. a printing machine. Twenty-four years later,in 1474,an Englishman called William Caxton printed the first printed book in English. His second book was about the game of chess. Caxton printed about a hundred books,and some can still be found today in museums.

1. century 2. published 3. page 4. found 5. colors 6. Although 7. visited 8. knowledge 9. until 10. invented