Ключевые слова: 1, adult, background, backpack, blackboard, browsing, casual, caucasian, chalkboard, cheerful, class, classroom, college, computer, course, distant, education, expression, foreign, guy, hello, holding, human, internet, language, laptop, learn, learning, lectur, linguistcs, male, man, occupation, online, people, smile, smiling, student, study, technology, teen, teenager, typing, university, young,