The idea for the Internet began in the early 1960s in __4__.The Department of Defense wanted to __5__ their computers together in order to __6__ private information.In 1969，the ARPA net (an early form of the Internet) first connected the __7__ at four American universities.One computer successfully __8__ information to another.In 1972，scientists shared ARPA net __9__ the world.They created a __10__ to send person­to­person messages using ARPA net.This was the __11__ of email.

　　Over the next few years，there was a lot of progress made in the world of computing，__12__ most people were not using the Internet.Then，in the 1980s，personal computers became more __13__.In the early 1990s，__14__ important things happened：the birth of the World Wide Web in 1991，and the creation of the __15__ Web browser(浏览器) in 1993.The web made it __16__ to find information on the Internet，and to move from place to place __17__ links.The Web browser made it possible to see information as a website with pictures，sound，and words.

　　Today，__18__ of people connect to the Internet to send emails，visit websites，or store information on servers.__19__ are now an important part of our lives and are changing __20__ we learn，work，shop and communicate.

1．A.post office B．supermarket

C．department store D．the office

答案　A

解析　根据上文send mails可知答案。

2．A.Expressions B．Phrases

C．Letters D．Words

答案　D

解析　word单词；vocabulary词汇，根据句意"电邮、下载已成为人们日常口头谈论之词"，故选D项。

C．server D．browser

答案　B

解析　根据第二段第一句可知选B项。

4．A.America B．England

C．China D．Canada

答案　A

解析　根据其后的The Department of Defense和本段中的American universities可知，这里指的是美国。

5．A.put B．get C．connect D．leave