17．閱讀下面材料，空白處填入適當(dāng)?shù)膬?nèi)容 （1個(gè)單詞）或括號(hào)內(nèi)單詞的正確形式。
The History of English English is now the most common language in the world.It is the （1）
（one） language in the UK，the USA and Canada.It is also the most popular second language， （2）
means English is probably spoken by over one billion people around the world.But how did we arrive at the English we speak today？
The history of （3）
English language begins in the fifth century with the invasion （入侵） of Britain by three tribes from Germany--the Angles，Jutes and Saxons.The original language of Britain was an older European language （4）
（call） Celtic.Over time，most of the Celtic speakers were forced into the north and west of the British Isles.The invaders （5）
（speak） a language called Anglo-Saxon and many of the most common words in English come from this.
In the eighth and ninth （6）
（century），there were other invasions by the Vikings from Scandinavia.These brought words like "knifr"，or knife into the English language.
Outside of the United Kingdom，the use （7）
English is growing.It is the official language of the European Union，and （8）
（use） all over the world for air traffic control.Also，English is used （9）
（much） than any other language on the Internet， （10）
（make） it an important language in the world.
