Q: Read the article and select the best answer. Article: If you are looking for an animal to take the title of "most violent fish in the sea", then the tiger puffer fish would have to be a strong contestant. Not only is it deadly poisonous --- though that doesn't stop people trying to eat it --- but it is also able to scare off enemies by inflating itself to become much larger than normal, when it is young it even chews on its own brothers and sisters. Tiger puffer fish attach their eggs to rocks near the bottom of the sea, often at the mouths of bays. Then the larvae move to the entries of rivers and lakes once they have grown a little. Then, having put on a lot of weight, they head out to sea. There's no innocent childhood for the puffer fish, as Shin Oikawa of Kyushu University in Japan and his colleagues found out when they put the larvae of tiger puffer fish in the lab and monitored them for two months. They found that the larvae went through three steps in which their metabolic rates increased dramatically when they reached body weights of 0.002g, 0.01g, and 0.1g. When a larva went through one of these steps, its behavior also changed. For instance, once a larva had passed the first level it would have grown its first tooth and could start attacking larvae that had not yet reached that stage. Similarly, any larva that had reached the 0.01g or 0.1g levels would start attacking lighter larvae. The researchers noted that the baby fish had a "relatively small mouth", so rather than swallowing their brothers and sisters whole, they would bite pieces out of them. Despite this limitation, the fish caused plenty of deaths --- up to 12 per cent of the deaths that happened in the lab each day. Those fish that grew fast enough to be able to chew on their fellows had an advantage. The extra food accelerated their growth and development. Tiger puffer fish are likely to be faster and swifter, so they can deal better with enemies. As the name suggests, puffer fish can inflate to make themselves seem much larger than they really are, thus scaring off enemies. They do... Question: Where does the poison in the puffer fish's body come from? Options: A: Its inner organs. B: The air it breathes in. C: The diet it eats. D: The bacteria around it.
A: C

Q: Read the article and select the best answer. Article: Because I am extremely vulnerable to both slick advertising and peer pressure, I've been thinking about getting an iPad. But here's the problem: I'm cheap, and the iPad's not. If I'm going to fork over at least $499 for a new device, I want to try it out and make sure it's not just a larger, shinier version of my iPhone. But if I went to my local Apple Store, I'd get to spend only a few minutes testing out the machine. I wanted more time than that, so I rented one for $15 a day from a guy on SnapGoods. The Internet start-up in Brooklyn runs on simple reasoning: there are people who want to borrow stuff - camping equipment, food processors, robot vacuums, etc. - and there are people who have stuff they want to lend. SnapGoods helps these two groups connect over the Web. SnapGoods is one of many sites that have sprung up to facilitate offline sharing. Some sites have a narrow, obvious focus (like SwapBabyGoods.com) while others are more obscure (Neighborhood Fruit helps people share what's growing in their yards or find fruit trees on public land). But regardless of whether the sharing is free or involves a fee, these transactions often come with a stick-it-to-the-man attitude. "Borrow these things from your neighbors," reads one earnest request on neighborrow.com, "The owner-ship has SAILED!" All of these sites are encouraging something academics call collaborative consumption - in other words, peer-to-peer sharing or renting. Renting something you don't need to use very often makes a lot more sense than buying it and letting it collect dust in your garage. There's a green aspect as well, since sharing helps cut down on overall use of resources. But one of collaborative consumption's most surprising benefits turns out to be social. In an era when families are scattered around the country and we may not know the people down the street from us, sharing things - even with strangers we've just met online - allows us to make meaningful connections. "This isn't just about saving the environment or saving a dollar,"... Question: SnapGoods is a website which _ . Options: A: facilitates online sharing B: helps people borrow things from their neighbors C: connects borrowers and lenders for stuff sharing D: sells iPad online
A: C

Q: Read the article and select the best answer. Article: Ashok Gadgil has spent the past three decades helping people in need--and he has no plans to stop .On May 2, Gadgil won the$100.000 Lemelson-MIT Award for Global Innovation. Each year,the honor is given to an inventor who has improved the lives of people in developing countries. Gadgil's inventions have helped more than 100 million people around the world. Gadgil is a professor and physicist at the University of California. When he's not teaching,he works to find solutions to global problems such as energy efficiency and water safety. "I chose to focus on problems where my knowledge of science could help,"he said In the 1980s he came up with a program to make energy-efficient light bulbs more affordable for people in developing countries. Then in the 1990s,Gadgil designed his first life--saving invention,UV Waterworks .The device kills deadly disease --carrying germs from drinking water. It costs just one cent to clean five liters of water .Gadgil was inspired to find an inexpensive solution to the clean water crisis after more than 10,000 people in his home country of India died from an outbreak of Bengal cholera,in 1993 The disease is spread through _ food and drinking water .So far,the invention has provided safe drinking water to more than five million people in poor areas. As a professor,Gadgil encourages his students to stay positive about finding solutions to hard problems."Be optimistic when you try a hard problem."he says. "It's when you solve a large problem that you can have a big impact on the world" Question: Which of the following can best describe Gadgil? Options: A: Caring and optimistic. B: Independent and positive. C: Powerful and strict. D: Responsible and sensitive.
A: A