Ключевые слова: abstract, answer, background, black, blackboard, board, box, business, chalk, chalkboard, check, checklist, choice, choose, complete, concept, cross, exam, fable, false, fill, form, handwriting, icon, letter, lie, mark, real, script, select, sign, solution, survey, symbol, text, tick, title, true, truth, untruth, white, word, write,