D阅读下面的短文，为文中空白处选择恰当的句子。    The 1990s saw great changes in the way people communicate.People could send mail without going to the post office,and go shopping without leaving home.  59 The cause of this great change was the Intemet.    The idea for the Intemet began in the early 1960s in the United States.The Department of Defense wanted to connect their computers together in order to share private information.In 1969,the ARPA ner（an early from of the Intemet）first connected computers at four American universities.  60  In 1972,scientists shared ARPA net with the world.They created a way to send porson-to-person messages using ARPA net.This was the beginning of e-mail.    61  However,most people were not using the Intemet.Then,in the 1980s,personal computers became more common.In the early 1990s,two important things happened:the birth of the World Wide Web in 1991,and the creation of the first Web browser（浏览器）in 1993.The Web made it easier to find information on the Intemet,and to move from place to place using links. The Web and browser made it possible to see information at a website with pictures,sound,and words.    Today,millions of people conncct to the Internet to send e-mails,visit website,or store information on servers.  62 And computers are changing how we learn,work,shop,and communicate.