Ключевые слова: abc, alphabet, background, business, changeable, choice, communication, concept, conclusion, coronavirus, cube, danger, dangerous, decide, decision, doubt, doubtful, education, election, finance, health, hesitant, incertitude, letter, letters, management, message, misgivings, opportunity, outcome, phrase, query, question, risky, sign, suspicious, text, time, uncertain, uncertain times, uncertainty, unpredictable, unsure, wariness, wary, wood, wooden, word, words, worry,