Ключевые слова: answer, apprentice, approval, arm, asian, ask, caucasian, child, class, concept, course, crowd, diligence, education, exam, finger, group, hand, knowledge, learn, lesson, participant, people, question, raise, raised, raised arm, raised hand, raising, report, revealing, school, solution, student, study, study course, success, trainee, training, tutorial, up, volunteer, vote, woman,