A computer virus is a program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes. All computer viruses are manmade. Here are some virus prevention tips.

Do not open any files attached to an e-mail from an unknown, suspicious or untrustworthy source.

Do not open any files attached to an e-mail unless you know what it is, even if it appears to come from a dear friend or someone you know. Some viruses can replicate（复制） themselves and spread through e-mail. Better be safe that sorry and confirm that they really sent it .

Do not open any files attached to an e-mail if the subject line is questionable or unexpected. If the need to do so is there always save the file to your hard drive before doing so.

Delete chain e-mails and junk e-mail. Do not forward（转寄） or reply to any of them. These types of e-mail are considered spam（垃圾邮件）, which contains lots of annoying advertisements and useless information.

Do not download any files from strangers.

Be careful when downloading files from the Internet. Ensure that the source is a legitimate（合法的）and reputable one. Verify（证实）that an anti-virus program checks the files on the download site. If you are uncertain, don’t download the file at all or download the file to a floppy（软盘）and test it with your own anti-virus software.

Update your anti-virus software regularly. Over 500 viruses are discovered each month, so you’ll want to be protected. These updates should be at least the products virus signature files. You may also need to update the product’s scanning engine as well.

   Back up（备份） your files on a regular basis. If a virus destroys your files, at least you can replace them with your backup copy. You should store your backup copy in a separate location from your work files, one that is preferably not on your computer.

This passage mainly tells us              .

A. What a computer virus is

B. how to use e-mail safely

C. how to use computers safely

D. how to prevent computer viruses

Which of the following statements about computer virus is TRUE?

A. A computer virus is a kind of worm

B. Not all computer viruses are manmade

C. Computer viruses run according to our wishes

D. A computer virus is a program or piece of code.

When we use e-mail, we should                .

A. open all the files we receive

B. open any file even if we don’t know what it is

C. not open any files if the subject line is questionable

D. forward or reply to junk e-mail.

Which of the following statements is NOT true?

A. We’d better not down load any files from strangers.

B. We’d better download files from a legitimate and reputable source.

C. We should update our anti-virus software regularly.

D. We should store our backup copy in the same location as our work files.

A butcher watching over his shop was really surprised when he saw a dog coming inside the shop. He went over to the dog and noticed it had a note in its mouth. He took the note and it read “Can I have 12 sausages and a leg of lamb, please. The dog has money in his mouth, as well.”
The butcher looked carefully and was surprised to find that there was really a ten-dollar note there. So he took the money and put the sausages and lamb in a bag, placing it in the dog’s mouth. The butcher was so impressed, and since it was about closing time, he decided to shut up shop and follow the dog.
So off he went. He followed the dog to a bus stop. The dog stopped and started looking at the timetable. The dog checked out the time, and then sat on one of the seats provided. Along came a bus. The dog walked around to the front, looked at the number, and went back to its seat. Another bus came. Again the dog went around to the front, looked at the number and climbed on. The butcher, by now, open-mouthed, followed it onto the bus.
The bus traveled through the town and out into the suburbs. Eventually the dog got up, and moved to the front of the bus. It stood on two back paws and pushed the button to stop the bus. Then it got off with groceries still in its mouth.
Well, the dog and the butcher were walking along the road, and then the dog turned into a house. It walked up the path, and dropped the groceries on the step. Then it walked back down the path, took a big run, and threw itself against the door. Then again, it threw himself against it. There’s no answer at the house. so the dog waited at the door.
The butcher watched as a big guy opened the door, and started shouting at it. The butcher ran up, and stopped the guy. “Why do you shout at the dog? It is really a genius.” The guy responded, “You call this clever? This is the second time this week that this stupid dog’s forgotten its key.”
【小题1】Which may be the best title of the passage?

A butcher watching over his shop was really surprised when he saw a dog coming inside the shop. He went over to the dog and noticed it had a note in its mouth. He took the note and it read “Can I have 12 sausages and a leg of lamb, please. The dog has money in his mouth, as well.”

The butcher looked carefully and was surprised to find that there was really a ten-dollar note there. So he took the money and put the sausages and lamb in a bag, placing it in the dog’s mouth. The butcher was so impressed, and since it was about closing time, he decided to shut up shop and follow the dog.

So off he went. He followed the dog to a bus stop. The dog stopped and started looking at the timetable. The dog checked out the time, and then sat on one of the seats provided. Along came a bus. The dog walked around to the front, looked at the number, and went back to its seat. Another bus came. Again the dog went around to the front, looked at the number and climbed on. The butcher, by now, open-mouthed, followed it onto the bus.

The bus traveled through the town and out into the suburbs. Eventually the dog got up, and moved to the front of the bus. It stood on two back paws and pushed the button to stop the bus. Then it got off with groceries still in its mouth.

Well, the dog and the butcher were walking along the road, and then the dog turned into a house. It walked up the path, and dropped the groceries on the step. Then it walked back down the path, took a big run, and threw itself against the door. Then again, it threw himself against it. There’s no answer at the house. so the dog waited at the door.

The butcher watched as a big guy opened the door, and started shouting at it. The butcher ran up, and stopped the guy. “Why do you shout at the dog? It is really a genius.” The guy responded, “You call this clever? This is the second time this week that this stupid dog’s forgotten its key.”

1.Which may be the best title of the passage?

A. A clever dog.                                     B. A curious butcher.

C. A cruel owner.                                   D. A second lost key.

2.Why was the butcher surprised when he saw the dog?

A. Because there was a note in the dog’s mouth.

B. Because a dog was not supposed to come into his shop alone.

C. Because the dog was not afraid of being butchered.

D. Because the dog could read.

3.The passage implies that _________.

A. dogs are cleverer than man

B. dogs are our best friend

C. the butcher is a cruel person

D. some people are never satisfied with what they have got

4.The dog threw itself against the door, because _________.

A. it wanted to force the door open 

B. it wanted its owner to open the door

C. it wanted to punish itself for forgetting the key     

D. it wanted to get the butcher’s help

5.Which of the following statements is NOT true?

A. The butcher was curious so he followed the dog.

B. The dog didn’t get on the first bus because it was the wrong number.

C. To get off the bus, you should let the driver know by pressing the button.

D. The dog would be driven away by the big guy.

A butcher watching over his shop was really surprised when he saw a dog coming inside the shop. He went over to the dog and noticed it had a note in its mouth. He took the note and it read “Can I have 12 sausages and a leg of lamb, please. The dog has money in his mouth, as well.”

The butcher looked carefully and was surprised to find that there was really a ten-dollar note there. So he took the money and put the sausages and lamb in a bag, placing it in the dog’s mouth. The butcher was so impressed, and since it was about closing time, he decided to shut up shop and follow the dog.

So off he went. He followed the dog to a bus stop. The dog stopped and started looking at the timetable. The dog checked out the time, and then sat on one of the seats provided. Along came a bus. The dog walked around to the front, looked at the number, and went back to its seat. Another bus came. Again the dog went around to the front, looked at the number and climbed on. The butcher, by now, open-mouthed, followed it onto the bus.

The bus traveled through the town and out into the suburbs. Eventually the dog got up, and moved to the front of the bus. It stood on two back paws and pushed the button to stop the bus. Then it got off with groceries still in its mouth.

Well, the dog and the butcher were walking along the road, and then the dog turned into a house. It walked up the path, and dropped the groceries on the step. Then it walked back down the path, took a big run, and threw itself against the door. Then again, it threw himself against it. There’s no answer at the house. so the dog waited at the door.

The butcher watched as a big guy opened the door, and started shouting at it. The butcher ran up, and stopped the guy. “Why do you shout at the dog? It is really a genius.” The guy responded, “You call this clever? This is the second time this week that this stupid dog’s forgotten its key.”

1.Which may be the best title of the passage?

A．A clever dog.                          B．A curious butcher.

C．A cruel owner.                         D．A second lost key.

2.Why was the butcher surprised when he saw the dog?

A．Because there was a note in the dog’s mouth.

B．Because a dog was not supposed to come into his shop alone.

C．Because the dog was not afraid of being butchered.

D．Because the dog could read.

3.The passage implies that _________.

A．dogs are cleverer than man

B．dogs are our best friend

C．the butcher is a cruel person

D．some people are never satisfied with what they have got

4.The dog threw itself against the door, because _________.

A．it wanted to force the door open

B．it wanted its owner to open the door

C．it wanted to punish itself for forgetting the key

D．it wanted to get the butcher’s help

5.Which of the following statements is NOT true?

A．The butcher was curious so he followed the dog.

B．The dog didn’t get on the first bus because it was the wrong number.

C．To get off the bus, you should let the driver know by pressing the button.

D．The dog would be driven away by the big guy.

B

She is widely seen as proof that good looks can last for ever. But, at nearly 500 years of age, time is catching up with the Mona Lisa.

The health of the famous picture, painted by Leonardo da Vinci in 1505, is getting worse by the year, according to the Louver Museum(卢浮宫) where it is housed.

“The thin, wooden panel on which the Mona Lisa is painted in oil has changed shape since experts checked it two years ago,” the museum said. Visitors have noticed changes but repairing the world’s most famous painting is not easy. Experts are not sure about the materials the Italian artist used and their current chemical state.

Nearly 6 million people go to see the Mona Lisa every year, many attracted by the mystery of her smile. “It is very interesting that when you’re not looking at her, she seems to be smiling, and then you look at her and she stops,” said Professor Margaret Livingstone of Harvard University. “It’s because direct vision(视觉) is excellent at picking up details, but less suited to looking at shadows. Da Vinci painted the smile in shadows.”

However, the actual history of the Mona Lisa is just as mysterious as the smile. Da Vinci himself loved it so much that he always carried it with him, until it was eventually sold to France’s King Francis I in 1519.

In 1911, the painting was stolen from the Louver by a former employee, who took it out of the museum, hidden under his coat. He said he planned to return it to Italy. The painting was sent back to France two years later. During World War Ⅱ, French hid the painting in small towns to keep it out of the hands of German forces.

5.We can infer from the text that_______

A. the Mona Lisa is proved to be able to last another 500 years

B. Mona Lisa’s beauty is fading gradually with 500 years passing by

C. the Mona Lisa has been catching people’s wide attention in the past 500 years

D. Mona Lisa does not look out of date though painted 500 years ago

6.Which of the following is true about the Mona Lisa?

A. It was once taken away and hidden up by German forces.

B. Its painter himself loved it greatly and always kept it in a shade.

C. Mona Lisa stops smiling when you look at her wanting to see her smiles.

D. King Francis I bought it and then returned it to Italy.

7.Choose the right order about the happenings onto Mona Lisa.

a. It was stolen from the Louver.

b. Its painter sold it to King Francis I

c. Its state of health was checked.

d. It was returned to France and housed in the Louver Museum.

e. It was hidden and protected against Germans.

A. b-a-d-e-c       B. d-e-c-b-a        C. d-a-e-c-b       D. b-c-a-d-e

8.It may add to the difficulty in repairing the painting that_____.

A. experts haven’t noticed changes in its shape as visitors do

B. it is likely to be stolen again when it’s under repair

C. it is uncertain which country, Italy of France, should take charge

D. experts aren’t sure about the materials and the chemical state of its oil paint