Ключевые слова: apple, art, black, blackboard, book, bus, business, cap, certificate, collection, college, computer, design, diploma, education, flat, globe, graduate, graduation, hat, high, icon, illustration, internet, knowledge, laptop, learning, lesson, library, line, mathematics, pen, pencil, pictogram, reading, ruler, school, science, sign, student, study, symbol, teaching, technology, thin, university, web, writing,