Ключевые слова: application, back, background, ballpoint, book, class, close, collection, concept, content, contents, cover, day, desk, document, education, focus, form, group, information, international, introduction, iq, knowledge, learning, letter, library, literature, nobody, object, page, paper, pen, pile, print, reading, row, scarper, school, skill, stack, study, test, tests, text, texture, vintage, wisdom, wood, word,