Ключевые слова: adult, audience, audience hands, background, business, class, coach, communication, company, concept, conference, corporate, crowd, discussion, education, employee, event, female, girl, group, hand, happy, job, lecture, meeting, office, people, presentation, presentation questions, professional, public, question, raise, school, seminar, speaker, speech, staff, student, teacher, team, training, up, women, work, worker, workshop, young,