9.
The 1990s saw great changes in the way people communicate. People could send mail without going to the (1) , and go shopping without leaving home. (2) like email and download became part of people’s vocabulary. The cause of this great change was the
(3) .
The idea for the Internet began in the early 1960s in (4) . The Department of Defense(美国国防部)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 person-to-person 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 and 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 email, 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.