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Read the following article and select the best answer. Article: Walls and wall building have played a very important role in Chinese culture. In ancient times, not only towns and villages, but also the houses and the temples within them were surrounded with walls. Also, the houses had no windows overlooking the street. Thus, walking in a city would give the feeling of wandering around a huge maze . The word "city" in Chinese also means "wall". The god of walls and mounts, whose duty was, and still is, to protect and be responsible for the welfare of the residents in these cities, villages, houses and temples. So a great and extremely hard task such as constructing a wall, which was supposed to run the length of the country, might not sound absurd . However, it is indeed a common mistake to think of the Great Wall as a single building structure, and it would also be a mistake to assume that it was built during a single dynasty. Actually, several dynasties somehow contributed to the construction of the Great Wall, the foundations of which had been laid many centuries ago. It was during the fourth and third centuries BC that warring states started building walls to protect their kingdoms, both against one another and against the northern nomads . The Great Wall played an important role in the growth of Chinese economy in history. Many settlements were established along the new border. Armies were instructed to reclaim wasteland and to plant crops there. Also, roads and canals were built. All of the work greatly helped increase the country's trade and cultural exchanges with many remote areas and also with the southern, central and western parts of Asia. Question: Why did ancient Chinese cities seem like a maze? - Because there were usually more walls than houses. - Because the outside walls of houses had no windows. - Because the word "city" means "wall". - Because there were legends about the god of walls.
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Because the outside walls of houses had no windows.

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Read the following article and select the best answer. Article: A group of Russian criminals have stolen l.2 billion username and password combinations for more than 500 millione-mail addresses. It's the largest known theft on the Internet, according to a report of The New York Times. Cyber security firm Hold Security discovered the security breach( ). The firm found that the group of criminals collected personal information from 420,000 websites, including household names and small Internet sites. The criminals were based in a small city in south central Russia. They hacked websites inside Russia as well as big companies in the U.S. and other countries ,The New Times reports. The criminals found hundreds of thousands of weak websites and attacked their coding,Hold Security said. Alex Holden is chief information security officer of Hold Security. "The hackers did not just target U.S. companies;they targeted any website they could get," Holden said. "And most of these sites are still easy to attack". According to Hold Security, the criminals have been using the stolen information to send junk mail through e-mail and on social networks like Twitter. They can also use the 500 million stolen e-mail -addresses to plan other crimes. They could use information from bank e-mails to steal your identity or sell the e-mail address to other criminals to make quick cash. The reported break-ins are the latest events to raise doubts about security at big and small companies. Last winter, hackers stole 40 million credit card numbers and 70 million addresses, phone numbers and other personal information from the retailer Target Corp. The brand is still working to regain its shoppers' trust. John Prisco is a CEO of a security firm. He says security hacks are more common than many people and companies realize. " _ ," Prisco said in an e-mailed statement. So many cyber breaches today are not actually reported, because companies are losing information and they are not even aware of it. " Security experts believe hackers will continue breaking into computer networks unless companies become... Question: According to Alex Holden, the criminals entered some websites easily because _ . - some websites don't have their own coding - most of the websites lack protective measures - Russia is more developed in computer science - the hackers are equipped with high technology
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most of the websites lack protective measures

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Read the following article and select the best answer. Article: Armed only with iPhones, the inventive rock band Atomic Tom has gone viral by way of the New York subway. The band has scored an Internet hit with the video to the song "Take Me Out." Singer Luke White says the production was a top-secret operation. "We didn't tell anyone about this. It was completely top-secret from our family, from our friends, from our label, our management, everybody. So the first time that people saw this video was last Friday when we put it on YouTube,"explained White. Since uploading the video to YouTube, band members have spent several days refreshing the page to watch the number of hits rise. The video has also made its way around Twitter as many people have shared it with their friends. "I mean, it still hasn' t quite hit.It' s just kind of blowing our minds right now that we're getting this: ma ny people are fond of it, and they' re sharing it with their friends.We don' t know what it's like really to have something that's viral, so all of this is very new to us." said Eric Espiritu, the lead guitarist of the band. White explains how the video came together: "We did our research with the applications( ) and found applications that worked out really well with the instruments and then we plugged them all into, plugged our phones into mini-battery powered amplifiers that we put underneath our seats, and we did a lot of, you know, practices, in terms of figuring out what the balance of the sound and like who was overpowering, who was too loud or who was too soft." The idea for the video came from Espiritu's younger brother Benjamin. The younger Espiritu directed the video from his initial concept through the final edit and upload to the Internet. "I' ve seen a lot of the music applications come out, and I' ve never actually had the chance to play with them,"says Ben Espiritu. "When I started hearing about how they sound and e verything, I thought it might be unique to take it one step further and then create an entire band just performing solely on the iPhones, and I thought it... Question: What is the significance of the success of the band' s music video? - It has introduced us several talented musicians. - It has made the musicians into millionaires. - It teaches the young a big lesson. - It reflects the talent and ability of the musicians and the times that we live in.
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It reflects the talent and ability of the musicians and the times that we live in.