Ключевые слова: abbreviation, acknowledge, action, advertisement, answer, ask, background, business, challenge, choice, comment, communication, complaint, decision, dilemma, doubt, education, event, explain, explanation, feedback, french, help, idea, information, invitation, justification, know, mail, message, problem, question, quiz, reply, report, resolution, respond, response, result, return, rsvp, school, search, solution, statement, studying, suggestion, support, test, word,