Read the following article and select the best answer. Article: If doctors want to test you for something, they'll usually take a blood or urine sample . But wouldn't it be much more convenient if they just asked you to breathe through a special instrument? In fact, your breath can say a lot about you. In traditional Chinese medicine, doctors draw a conclusion about the health state of a patient based on the smell of his or her breath; trained dogs and rats can identify the smells of the breaths of people suffering from certain cancers; traffic police also monitor drivers' alcohol consumption by testing their breaths. Just like blood and urine, your breath contains lots of " metabolites " --- the waste chemicals that the body produces, which vary from person to person. They are like personal health fingerprints, which is why scientists sometimes call them " breath prints", according to Science Daily. Compared to blood or urine testing, breath testing takes only seconds instead of hours, and it requires neither a needle nor a container to hold the body fluids . This means the test can be taken frequently to better detect early signs of diseases and monitor the progress of a medical treatment. On the other hand, as an identifier, you might think that breaths are not as reliable as fingerprints since they might change based on what you eat. However, researchers in Zurich, Switzerland mapped 11 healthy volunteers' chemical patterns by having them breathe through a special instrument, and they found that each pattern was unique and the patterns didn't change much throughout the day, reported BBC. "Our goal is to develop breath analysis to the point where it becomes competitive with the established analysis of blood and urine," said Malcolm Kohler, professor at the University Hospital Zurich. Question: According to the text we know that _ . - breath varies from person to person based on food - your breath may give you away if you are not careful - doctors can test one's breath to find about his illness - dogs can identify people with certain cancers
doctors can test one's breath to find about his illness

Read the following article and select the best answer. Article: A study has found, spending hours playing violent video games prevents teenagers from their moral growth. It is thought that regular touch to violence and lack of contact with the outside world makes it harder for them to tell right from wrong.They also struggle to trust other people,and see the world from their viewpoints. Researchers from Brock University in Ontario found that those who spend more than three hours each day in front of the screen are particularly unlikely to have developed the ability to empathize . The Canadian researchers surveyed 109 boys and girls,aged 13 and 14,about whether they played video games,which games they liked,and how long they spent playing them.Their findings found that 88 percent of teens said they played games,and more than half admitted to playing games every day.Violent games were among the most popular. The teenagers also filled in a questionnaire designed to measure their moral development.For example,they were asked how important it is to save the life of a friend. Previous studies have suggested that a person's moral judgment goes through four phases as they grow from children and enter adulthood.By the age of 13 or 14,scientists claim young people should be entering the third stage,and be able to empathize with others and take their viewpoints into account.The research found that this stage appeared to be delayed in teenagers who regularly played violent video games. It is also thought that teenagers who play games regularly did not spend enough time in the real world to learn to take others' thoughts into consideration.Researcher Mirjana Bajovic said:"The present results indicate that some teenagers, who spent three or more hours a day playing violent video games,are deprived of such opportunities." he added:"Touch to violence in video games may influence the development of moral reasoning because violence is not only presented as acceptable but is also justified and rewarded." They concluded that rather than trying to enforce an 'unrealistic' ban on the... Question: What does Mirjana Bajovic want to tell us according to his words? - Playing games regularly will improve teens' intelligence. - Vio1ent games cost teens social experiences in real life. - Playing games makes teens help others. - Playing games inspires teens to develop fast.
Vio1ent games cost teens social experiences in real life.

Q: Read the following article and select the best answer. Article: How to apply for a free mailbox ? First you have to connect to the Internet and go to the homepage of the ICP providing free mailboxes. Then you will find an icon , an agreement about the rules for using the free mailbox will appear. If you want to go, click the icon "I agree". Then you have to fill in a form about your basic personal data, and the name and PIN of the mailbox. The PIN is the key to the mailbox. After finishing these, you will get a mailbox like this:your name @ mail server (for example:tvguide@mail.cctv.com.cn. "tvguide" is the name of the mailbox, and "mail.cctv.com.cn" is the name of the mail server.). The mailbox is separated into two parts by a separator "@", which is read as "at". The former part is the name of the mailbox. The latter is the domain name of the mail server. All mails to you will be received by the server and put into your mailbox. You can read these mails on any computer on the Internet in the world, if you have the name and PIN of the mailbox. Question: If you want to send or receive an e-mail, you should first _ . - apply for a mailbox - buy a computer - go to the post office - fill in a form
A: apply for a mailbox

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Read the following article and select the best answer. Article: On May 23rd the United States Department of Agriculture will meet to discuss the pressing topic of wild pigs. These beasts, which number 6 million or so, are an increasing bother. At their worst, they can damage crops, spread diseases, attack humans and kill farm animals. And things are getting worse: a study show that they are likely to double in number over the next 3 years. Why is it so hard to control wild pigs? Introduced to America in the 16th century, and related to the wild pigs found in Europe, wild pigs can be found in 75% of all states. No single law exists to control them and regulations differ between states: while in Missouri they can only be shot if met by chance, in Texas hunting is actively encouraged. A "pork chopper" law allows Texan hunters to shoot wild pigs from helicopters, and some people in Louisiana have even built their own pighunting drone . As well as being popular with hunters, wild pigs are cheaper for game raisers to breed than deer. In Michigan and Pennsylvania suggested bans on the private breeding of pigs for hunting have caused quarrels between game raisers and wildlife officials. Wild pigs' double nature----considered pests by farmers, but valued by hunters----makes it hard to pass laws to control them. Two other factors also contribute. Nearly 70% of land in America is privately owned. And it is difficult for lawmakers to impose breeding and hunting laws on private landowners. Secondly, it is hard to define a wild pig. In some states, laws are being introduced to redefine the term "wild animal" to keep out wild pigs. This is good news for those raising pigs for hunting, but less are to those who consider them pests whose number should be limited. Meanwhile, discussions continue over how to deal with this problem. Question: What is the best title of the text? - Why are wild pigs so hard to control? - Are wild pigs pests or wild animals? - Wild pigs----an increasing danger in the US. - How to deal with the problem of wild pigs?
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How to deal with the problem of wild pigs?