Ключевые слова: 20s, attention, attentive, caucasian, classmates, classroom, college, concentrated, concentrating, concentration, desk, education, equipment, exam, examination, female, holding, indoors, information, knowledge, letter, listening, male, man, paper, paying, pen, question, quietness, raising hand, room, school, smiling, student, studying, table, taking notes, test, uni, university, woman, working, writing, young adult,