Have you ever posted your photos on the Internet? Would you mind if people cut part of your photo, perhaps your face, and paste（粘貼）it into other photos as a joke? Most people would not like to be made fun of in this way. However, it is not uncommon for people to find such pictures of themselves on the Internet.

We are living in an age of information explosion. People work, play and communicate with others over the Internet. However, we must always bear in mind that some people may use others personal information for unpleasant purposes. A good example of this is what happened to a 25-year-old man. He received an e-mail that appeared to be from his bank, asking for his bank details. However, after he sent his account(賬戶) number to the sender, he found that money was  stolen out of his bank by online criminals.

This story warns us and reminds us never to tell strangers information such as our real names, parents names, telephone numbers or home addresses. Remember to remove any private information, like your photos, after using another person's computers. Also remember not to give out unnecessary but important information when filling in online forms. We need to learn to keep our private information safe. This is the key to protecting ourselves in a world where the Internet is becoming more and more important.

49. The underlined word ‘criminals' means _______in Chinese.

A.發(fā)送            B. 接收            C.犯罪           D.轉(zhuǎn)移

50. What does this passage teach us?

   A. Never give any information to anyone online.

   B. Only give some necessary but real information to the strangers online.

   C. Only give some unnecessary and unimportant information when filling in a form.

   D. Never give your personal information to strangers online.

51. How did the 25-year-old man lose his money?

   A. The bank lost his details and account number.

   B. The money was stolen from the bank.

   C. He gave his personal information to online criminals.

   D. It was stolen from him as he returned from the bank.

52. According to the passage, which of the following is not correct?

   A. People do not want their pictures to be cut and pasted into others just for fun.

   B. We are living in a world of information.

   C. We should learn how to communicate with others on the Internet in a safe way.

   D. We must be careful in daily life, because some criminals will get closer to us.

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