阅读理解

　　Computer users are being warned by industry experts to pay attention to secret codes which could be used to record their conversations.

　　E-mail, screensavers, and electronic greeting cards can carry a secret code which is able to turn on the computer's micro-phone, make a recording, and forward it to someone else without the user's knowledge.

　　In fact any attachments(附件) sent to a computer, whether it is a game of Space Invaders, or a moving picture, can possibly be used to spy.

　　Experts say people should always think twice about opening attachments because—although rat common—bugging(窃听) by computer can, and has been done.

　　Bill Lyons, head of the Internet Security Company Finjian, said, “People in the army have tested this and you can be sure, if people in general are aware of(知道) it, then computer hackers are aware of it. The frightening thing is that there are tools on the Internet which people, using a simple search method, can find, and which will enable them to attach this dangerous code to simple attachments. ”

1．When the secret code lets out the conversation from the computer, the user of the computer ________.

[　　]

A．may know nothing about it

B．must turn off the computer

C．can do nothing but wait

D．can't use the computer properly

2．According to the passage, bugging by computer has ________ been done.

[　　]

3．What worries the experts is that ________.

[　　]

A．tools can easily be got to tie dangerous codes to E-mails

B．nobody knows the danger of the code

C．nobody seems to believe such things

D．effective ways can never be found to deal with the problem

4．What is the advice given in the text?

[　　]

A．Use secret codes to record other people's conversations.

B．Be careful when opening an attachment.

C．Never open any attachment.

D．Attach some codes to your E-mails.

Do you know of anyone who uses the truth to deceive (欺骗)? When someone tells you something that is true, but leaves out important information that should be included, he can give you a false picture.

For example, someone might say, I just won a hundred dollars on the lottery (彩票). It was great. I took that dollar ticket back to the store and turned it in for one hundred dollars!

This guy's a winner, right? Maybe, maybe not. We then discover that he bought $ 200 worth of tickets, and only one was a winner. He’s really a big loser!

He didn’t say anything that was false, but he left out important information on purpose. That’s called a half-truth. Half truths are not technically lies, but they are just as dishonest.

Some politicians often use this trick. Let’s say that during Governor Smith’s last term, her state lost one million jobs and gained three million jobs. Then she seeks another term. One of her opponents (对手) says, “During Governor Smith’s term, the state lost one million jobs!” That’s true. However, an honest statement would have been, “During Governor Smith’s term, the state had a net gain of two million jobs.”

Advertisers (广告商) will sometimes use half-truths. It’s against the law to make false statements so they try to mislead you with the truth. An advertisement might say, “Nine out of ten doctors advised their patients to take Yucky Pills to cure toothache.” It fails to mention that they only asked ten doctors and nine of them work for the Yucky Company.

This kind of deception happens too often. It’s a sad fact of life: Lies are lies, and sometimes the truth can lie as well.

1.How much did the lottery winner lose?

2.We may infer that the author believes people should ______.

3.What do the underlined words net gain in Paragraph 5 mean?

4.What can we know from the example of the Yucky Pill advertisement?

Do you know of anyone who uses the truth to deceive(欺骗)? When someone tells you something that is true, but leaves out important information that should be included, he can give you a false picture．

For example, someone might say, “I just won a hundred dollars on the lottery(彩票). It was great. I took that dollar ticket back to the store and turned it in for one hundred dollars!”

This guy's a winner, right? Maybe, maybe not. We then discover that he bought $ 200 worth of tickets, and only one was a winner. He’s really a big loser!

He didn’t say anything that was false, but he left out important information on purpose. That’s called a half-truth. Half truths are not technically lies, but they are just as dishonest.

Some politicians often use this trick. Let’s say that during Governor Smith’s last term, her state lost one million jobs and gained three million jobs. Then she seeks another term. One of her opponents says, “During Governor Smith’s term, the state lost one million jobs!” That’s true. However, an honest statement would have been, “During Governor Smith's term, the state had a net gain of two million jobs.’’

Advertisers will sometimes use half—truths. It’s against the law to make false statements so they try to mislead you with the truth. An advertisement might say, “Nine out of ten doctors advised their patients to take Yucky Pills to cure toothache. ”It fails to mention that they only asked ten doctors and nine of them work for the Yucky Company.

This kind of deception happens too often. It’s a sad fact of life: Lies are lies, and sometimes the truth can lie as well.

1.How much did the lottery winner lose?

A．One hundred dollars．                   B．Two hundred dollars．

C．Three hundred dollars．                  D．Four hundred dollars．

2.We may infer that the author believes people should ________.

A．buy lottery tickets if possible

B．make use of half—truths

C．be careful about what they are told

D．not trust the Yucky Company

3.How many examples does the writer give to show how the truth is used to deceive?

A．One．            B．Two．            C．Three．          D．Four．

4.Which of the following is true according to the passage?

A．Using half truths is against the law.

B．Technically, half truths are in fact lies.

C．Yucky Pills is a very good medicine for toothache.

D．Governor Smith did a good job during her last term.

5.Which of the following best expresses the main idea of the passage?

A．He’s really a big loser!

B．Sometimes the truth can lie as well．

C．Advertisers will sometimes use half truths．

D．It’s against the law to make false statements．