Now more and more people buy and sell things on the Internet. They buy and sell goods to make money. So hackers(黑客) around the world are interested in this.
Hackers are often young people who love computers greatly. They use computers to get on the Internet, looking for ways to go into computer systems run by banks, homes and all kinds of offices. If they go into a computer system, they will find other people's credit cards and try to steal the numbers. With the numbers they can take the money out of the bank.
Hackers often break into your computer system, but it's difficult to find them. So it is also difficult for you to find the hacker who is taking your money out of the bank. Hackers can get the money from a bank with the credit card number they have got from your computer.
Scientists always ask people who have computers to pay attention to hackers. They also tell people how to fight the hackers. The answer is to choose a clever password(密碼) and change it often and not to show your credit card out to anybody. If you are not careful, it's just like keeping the bank door wide open.
1.The underlined word “this” refers to .
A.helping others on the Internet B.buying and selling things on the Internet
C.saving money on the Internet D.giving money to others
2.Which is NOT true about hackers?
A.They are often young people. B.They look for ways to go into computer systems.
C.They love computers greatly. D.They steal money from other's computers.
3.It's to find the hackers who break into your computer system.
A.easy B.nice C.hard D.wrong
4.Which of the following is NOT about protecting the credit card?
A.Choosing a clever password. B.Changing the password often.
C.Putting your money into the bank. D.Don't show your credit card out to anybody.
5.What can we learn from the passage?
A.Be careful to use our credit cards. B.We shouldn't use computers often.
C.Don't show your credit card out to anybody. D.We must catch the hackers.
