Ключевые слова: average, background, bad, black, box, business, buyer, check, checkbox, client, comment, concept, consumer, customer, excellent, fair, feed, feedback, form, good, happy, help, information, ink, inquiry, isolated, list, mark, marketing, opinion, paper, pen, poll, poor, positive, questionnaire, sales, satisfaction, seller, service, sheet, success, survey, tick, tickbox, white,