1. 500                               a) a time when two languages became similarly important 2. cheerio                          b) the year in which a study was carried out3. 1979                               c) the number of new words entering the dictionary every four months4. German                         d) a time when people were encouraged not to speak a language5. the 19th century             e) an example of something thought of as fashionable6. 1993                             f) an old way of saying ‘goodbye’ to someone​