Ключевые слова: advertising, art, background, billboard, blackboard, blank, book, books, class, classroom, college, colorful, concept, copy, copyspace, desk, diverse, documents, education, effect, elementary, elements, empty, equipment, exercise, frame, globe, history, ideas, learning, message, nobody, office, pattern, pen, pencil, pens, photo, school, scratch, source, space, stationary, stationery, student, study, teacher, textbook, view, white,