Ключевые слова: ability, alternative, announcement, answer, balance, business, businessman, challenge, change, choice, choose, company, conclusion, confusion, contrast, cubes, decide, decision, different, direction, education, efficiency, guidance, hand, helpful, idea, marketing, meaning, message, opposite, opposition, option, reminder, right, select, selection, solution, strategy, success, successful, text, use, use ful, use less, useful, useful or useless, usefulness, useless, word,