Question: I'm taking a test and have to guess the right answer to the question after the article. Article: When you think about math, you probably don't think about breaking the law, solving mysteries or finding criminals. But a mathematician in Maryland does, and he has come up with mathematical tools to help police find criminals. People who solve crimes look for patterns that might reveal the identity of the criminal. It's long been believed, for example, that criminals will break the law closer to where they live, simply because it's easier to get around in their own neighborhood. If police see a pattern of robberies in a certain area, they may look for a suspect who lives near the crime scenes. So, the farther away from the area a crime takes place, the less likely it is that the same criminal did it. But Mike O'Leary, a mathematician at Towson University in Maryland, says that this kind of approach may be too simple. He says that police may get better clues to the location of a criminal's home base by combining these patterns with a city's layout and historical crime records. The records of past crimes contain geographical information and can reveal easy targets -- that is, the kind of stores that might be less difficult to rob. Because these stores are along roads, the locations of past crimes contain information about where major streets and intersections are. O'Leary is writing a new computer program that will quickly provide this kind of information for a given city. His program also includes information about the people who live in the city, and information about how a criminal's patterns change with age. It's been shown, for example, that the younger the criminal, the closer to home the crime. Other computer programmers have worked on similar software, but O'Leary's uses more math. The mathematician plans to make his computer program available, free of charge, to police departments around the country. The program is just one way to use math to fight crime. O'Leary says that criminology -- the study of crime and criminals -- contains a lot of good math problems. "I feel like I'm in a gold mine and ,"... Question: What is the main idea of the text? Options: A: Criminals live near where crimes occur. B: Math could help police find criminals. C: Crime records could be used to fight crime. D: Computer software works in preventing crimes.
Answer: B

Question: I'm taking a test and have to guess the right answer to the question after the article. Article: With smart phones taking the world by Storm, a phone that can only send and receive voice calls and text messages may seem like a relic from a bygone age. Yet in East Africa,simple phones like these are changing the face of the economy, thanks to the mobile money services that are spreading across the region. Using the text-messaging function built into the GSM system used by most cell phone networks, these services allow people without a bank account or credit card to use their phone as an electronic wallet that can be used to store. send or receive cash. It works like this: you pay cash to your local agent who then tops up your mobile money account using a secure form of text messaging. That money can be transferred to another person by sending a message to their cell phone account. For some the system is a lifeline. "If I didn't have my mobile phone. I would be very poor, "says Neyasse Neemur, a mother of four children who lives in northern Kenya. "Now I can sell fish." Neemur took up fishing in July last year, but making money from it was a little tricky, especially as Turkana people do not usually eat fish. A truck from Ethiopia to Tanzania passes through her village once a week, and she arranged to have the driver transport the fish several hundred kilometres south to market in Kisumu, where her s sell the fish. "I get the money transfer immediately." says Neemur. "Then I can pay for my children to go to school and for vegetables and beans," she adds, "so I don't need to eat fish." According to the Central Bank of Kenya, payments worth around l billion Kenyan shillings($13 million)per day were transferred through Kenya's mobile money systems in 2009, equaling the country's credit card transactions . The bank expects mobile money transfers to overtake credit cards in 2011. Question: The story of Neyasse Neemur suggests that _ . Options: A: the mobile money service plays a key role in the locals' life B: Neemur uses her mobile phone to contact her customers C: her s tricks Turkana people to eat the fish they sell D: the Bank of Kenya helps her improve her living condition
Answer: A

Question: I'm taking a test and have to guess the right answer to the question after the article. Article: Lichens are difficult to see. They don't move. They often mix into the living place. You might not even recognize one if you are looking right at it. Lichens live on rocks, branches, houses, and even metal street signs. You can find these colorful organisms almost everywhere -- from deserts to rainforests, and from Antarctica to Africa. They've traveled in outer space, and some scientists think there might even be lichens on Mars. What you probably don't realize is that a lichen is more than a single thing. It includes two different types of living organisms: a fungus and an alga . Neither of these organisms is a plant, so the lichen isn't a plant either. Through photosynthesis , the alga gets the sun's energy to make food for the fungus, which is the place for the alga to live in. However, the alga cannot leave the fungus. Around the world, scientists have found tens of thousands of types of lichens. Many may not even have been discovered yet. As scientists continue to find new kinds of lichens, they are also working to understand how they are connected to one another. By putting together a lichen family tree, they hope to understand why so many different types of lichens have grown in so many places around the world. Many researchers are trying to understand basic facts about the organisms and their connections. Researchers are also using lichens to examine the health of the environment. Question: Which of the following statements is NOT the scientists' purposes of studying lichens? Options: A: To understand basic facts about them. B: To creat a lichen family tree. C: To understand how lichens are related to each other. D: To understand why lichens can live in different places.
Answer:
B