Ключевые слова: background, box, business, businessman, button, check, choice, choose, computer, concept, concepts, control, cross, decision, drawing, education, exam, finger, form, green, help, icon, illustration, internet, isolated, key, manager, mark, marker, no, office, paper, pen, problem, push, question, red, sign, solution, student, success, symbol, test, thumb, tick, vote, voting, white, working, yes,