Ключевые слова: answers, business, check, checkbox, checklist, choice, clipboard, color, colorful, concept, contour, design, document, education, exam, examination, filled, flat, form, icon, illustration, incorrect, isolated, line, linear, lineart, list, mark, mistakes, note, office, outline, paper, pencil, questionnaire, quiz, report, result, school, sheet, sign, success, survey, symbol, test, tick,