判断正误,并给予理由: 1. Business etiquette can result in your success or failure in your career. 2. Because of the importance of international Business etiquette, focusing deeply on it is necessary for people who want to succeed. 3. In Britain , etiquette became a universal force in the eighteen century. 4. Debrett’s is popular in Britain because it updates itself. 5. Etiquette should be used in the interest of social progress.