Esperanto is what is called a planned, or artificial, language. It was created more than a century ago by Polish eye doctor Ludwik Lazar Zamenhof. Zamenhof believed that a common language wouĐoạn văn40/79The topic of this passage isa language developed in the last few yearsone man’s efforts to create a universal languageusing language to communicate internationallyhow language can be improveGiải thíchĐáp án: B