Insert the sentences. Every time you turn on your computer and connect to the Internet, there is,
possibility of attacking it. It could come via an e-mail from a friend, a software program
or music you download, or even from a CD-ROM you are using.
The most common source of danger is a virus, that is, a program that hides itself in
documents or software, and then attacks your computer. Sometimes, these are not to
serious. They may be so serious that they crash the computer. (1) Consequently, som
companies and even government departments have had to close while they try to find
and destroy a virus. (2) One type of virus known as a Trojan Horse is designed to ge
your credit card details or bank passwords. Once it has this information, it is sent to
organizations that steal your money from your bank or use your credit card to buy
things. Another danger is spyware. It might not do any damage, but it collects information
about you, for example what you buy online or what music you download. It then send
it to commercial companies. A more common, but less dangerous, problem is spam o
unwanted advertising. When it first appeared, nobody was worried about it, but now i
is out of control: more than 50% of all e-mail messages in the world are junk mail, o
spam. (3) Unfortunately, some people are now using spam to trick people and to ge
money from them. (4)

a. Therefore, next time you are online, make sure your anti-virus program is up-to
date.

b. This is called phishing.

c. In other words, they stop the computer working.

d. This can cost milions of dollars.

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Robin hood was a very honest and noble person. he was never indifferent to other people's problems. he stole money from other people who were rich and gave the stolen to poor people who really needed help. many writers and poets describe this man as a very good person and they respected him.