The Internet is the     1     (big)source of information in the world,     2     consists of millions of pages of data.

    3     (date)back to 1969, a US defense     4     (organize)developed a way for all their computers to talk to each other through their telephone. They created a network called DAEPANET, which, however,     5     (use)only by the US army. Then in 1984, the NSF started the NSFNET network, which was known     6     the Inter-Network. Later, an English scientist put forward     7     idea of the World Wide Web while he was working in Swizerland in 1989. He made     8     possible for everyone to use the Internet. The first “web browser”     9     (design)by him allowed computer users     10     (access)documents from other computers. From that moment on, the Internet grew. Within five years, the number of Internet users rose from 600, 000 to 40 million.

With the     1    (invent) of personal computers, the Internet and cell phones, people now have more immediate access to others and information     2     any time in history. Losing that access can lead to “disconnect anxiety’’,     3     is a psychological term used to describe the     4     (anxiety) feelings that people experience when they are unable     5     (use) their cell phones or cannot log on to the Internet. Some people     6     (affect) by disconnect anxiety may start to feel upset when     7    cannot reach their friends online. Others get really worried when they are not able to respond to emergencies, and this makes them feel     8    (help). Still others are so dependent on their cell phones that they are frightened of missing any phone calls. Cell phones and the Internet     9    (become) the most important technological tools to these people, who cannot afford to live     10    these things.