(一) Paper was first____about2,000 years ago, it has been made____silk, cotton, bamboo, and wood. People learned to write words on paper to make a book. And because there weren’t many books,____people learned to read. Then printing was invented in China. The first printed books were made by____ink on a wooden block and holding the paper against it. When printing was developed greatly ____the beginning of the11th century, books could be