精选优质文档-倾情为你奉上新视野大学英语（第三版）第二册课后翻译答案及原文Unit 1原文：English is known as a world language, regularly used by many nations whose English is not their first language. Like other languages, English has changed greatly. The history of the English language can be divided into three main periods: Old English, Middle English and Modern English. The English language started with the invasion of Britain by three Germanic tribes during the 5th century AD, and they contributed greatly to the formation o
