Ключевые слова: adult, aged, aged elderly, blackboard, blank, caucasian, chalkboard, class, classroom, college, copy space, copyspace, during, education, education school, educator, elderly, exam, grandfather, handsome, indoor, intelligent, knowledge, learning, lecturer, lesson, man, mature adult, mentor, occupation, old, old senior, oldage, portrait, professor, retirement, seminar, senior, senior professor, serious, study, studying, suit, teacher, teacher class, teaching, think, tutor, tutor study, university,