Ключевые слова: ancient, arrangement, background, book, bookshelf, bookstore, cement, chalk, class, classroom, colorful, concept, concrete, degree, desk, drawing, edition, educate, education, equipment, formulas, grey, group, hardcover, heap, knowledge, learn, library, literature, notebook, old, open, page, paper, read, school, science, stack, student, study, studying, table, teacher, textbook, university, vintage, wall, wisdom, wood, wooden,