as because called what throughout hard Zamenhof invented a new language (21) __________ Esperanto to improve understanding between people of different countries. He showed Esperanto to his friends to find out (22) __________ they thought about it. Later in the same year he went to study at a university in Moscow. He wanted to improve Esperanto. Zamenhof’s friends then worked (23) __________ to spread the new language. They tried to persuade schools (24) __________ the world to teach it. However, only a few people today speak Esperanto (25) __________ more and more people use English (26) __________ a foreign language (nhanh nhanh giùm cái đang vội)