Ключевые слова: adult, aged, aged elderly, blackboard, caucasian, chalkboard, chalkboard copyspace, class, classroom, college, copy space, copyspace, education, education school, elegant, exam, friendly, funny, grandfather, grey hair, handsome, happy, indoor, intelligent, knowledge, learn, lesson, man, mentor, old, old senior, oldage, portrait, professor, retirement, school, science, scientist, seminar, senior, study, studying, suit, teach, teacher, teacher class, teaching, tutor, tutor study, university,