Ключевые слова: academic, alarm, background, black, blackboard, board, books, card, celebration, chalkboard, class, clock, college, color, congratulations, day, education, event, festive, fun, happy, holiday, idea, inscription, international, job, knowledge, learn, literacy, object, phrase, pile, professional, professor, school, science, student, study, teacher, text, university, words, work, world, written,