After twenty-five years of hard work, he made a decision to retire.20/21After twenty-five years of hard work, he made a decision to retire.He made a decision to retire after he had worked hard for twenty-five years.He made a decision to retire after his hard work for twenty-five years.He has been working hard for twenty-five years before he retired.After he worked hard in twenty-five years, he made a decision to retireGiải thíchĐáp án đúng: A Dịch: Anh ấy quyết định nghỉ hưu sau khi làm việc chăm chỉ 25 năm.