Article: There are some things humans can go without. We can lose a kidney or a lung, an arm or two and still live perfectly well. But some fish put us to shame. They can _ without stomachs. One such fish is the stout longtom. The group it belongs to carries a more appropriate name: the needlefish. All needlefish lack stomachs. Their ancestors had them, but later they were lost. The stout longtom can reach 1.3 meters in length, and lives near the sea surface. Like all needlefish, it can jump out of the water to escape its enemies. Tropical fishermen are sometimes injured by needlefish. In 1977, a 10-year-old Hawaiian boy was killed when a needlefish jumped through his brain. The longtom eats smaller fish. It teeth are not good at cutting fish into pieces, so it swallows fish whole. Ryan Day from Australia and his colleagues wanted to know how the longtom digests its meaty meals without a stomach, so they ran some chemical tests about the fish. Day's results show that the longtom can consume food without the help of a stomach. It uses a special material called trypsin that can break down proteins without acid -- although the approach is less efficient than using a stomach. Because it's a meat-eating animal, the longtom gets a lot of protein in its food, so it can afford this slightly less efficient system for absorbing it. Two plant-eating fish that Day studies actually had higher levels of trypsin in their body, as their food was low in protein. Day thinks that the longtom and its stomachless relatives might actually have arrived at an energy-saving solution. He says that although the stomach is critical to many kinds of animal, the organ is "a fairly expensive organ to run". This perhaps explains why some animals have got rid of theirs. Question: Ryan Day ran the chemical tests in order to find out how the longtom _ . Yes or no, is the answer "digests the smaller fish in its body"?
Yes

(Question)
Article: Frank W. Woolworth was born in Rodman, New York, in 1852. His family was very poor farmers, and there was never enough to eat. Frank decided he did not want to be a farmer. He took a short business course, and went to work as a salesman in a large city. Woolworth realized he had a natural skill for displaying goods to arouse people's interest, but he soon learned something more important. One day his boss told him to sell some odds and ends for as much as he could get. Frank put all these things on one table with a sign which said: FIVE CENTS EACH. People fought and pushed to buy the things and the table was soon cleared. Soon afterwards, Woolworth opened his own store, selling goods at five and ten cents. But he had another lesson to learn before he became successful. That is, if you want to make money by selling low-price goods, you have to buy them in large quantities directly from the factories. Once, for example, Woolworth went to Germany and placed an order for knives. The order was so large that the factory had to keep running 24 hours a day for a whole year. In this way, the price of the knives was cut down by half. By 1919, Woolworth had over 1,000 stores in the USA and Canada, and opened his first store in London. He made many millions and his name became famous throughout the world. He always ran his business according to strict rules, of which the most important was: "THE CUSTOMER IS ALWAYS RIGHT." Question: The price of the knives was cut down by half because _ . Yes or no, is the answer "knives were ordered in large quantities directly from the factory"?
(Answer)
No

Ques: Article: A research by the National Center for Health Statistics is seen as an important confirmation of the"Hispanic mortality paradox ." On average,Hispanics _ whites by 2.5 years and blacks by 7.7 years. Their life expectancy at birth in 2006 was 80.6 years,compared with 78.1 for whites,72.9 for blacks and 77.7 years for the total population. The report shows that the Hispanic population has higher life expectancy at birth and at almost every age despite a socioeconomic status lower than that of whites."Mortality is very correlated with income,education and health care access,"says Elizabeth Arias,author of the report."You would expect the Hispanic population would have higher mortality,"in line with the black population. The Hispanic paradox has been documented for more than two decades,but this is the first time the government has had enough data to issue national numbers. Researchers are struggling to explain why Hispanics live longer. "We don't know,"says David Hayes-Bautista,director of the Center for the Study of Latino Health and Culture at UCLA's David Geffen School of Medicine."We thought it was a problem in the data,but we can pretty much say this is real." Potential factors: *Culture and lifestyle. Support from extended family and lower rates of smoking and drinking.Latino groups in particular have very strong family and social ties. *Migration. The"healthy migrant effect"argues that healthy people are more likely to emigrate. And when immigrants become ill,they might return home and die there. Solving the puzzle may help the nation deal with health care issues because Hispanics use health services less--they make fewer doctors visits and spend less time in hospitals,Hayes-Bautista says."It's clearly something in the Latino culture,"he says. Question: Which of the following inferences is true according to the passage? Yes or no, is the answer "Hispanics might have healthier ways of life."?
Ans: Yes

Ques:Article: The dodo is among the most famous extinct creatures, and _ for human-caused extinction events. Despite its bad name, and the fact that the species was alive during recorded human history, little is actually known about how this animal lived, looked, and behaved. A new study of the only known complete skeleton from a single bird takes advantage of modern 3-D laser scanning technology to open a new window into the life of this famous extinct bird. The study was presented at the 74th Annual Meeting of the Society of Vertebrate Paleontology in Estrel, Berlin. Leon Claessens, Associate Professor at the College of the Holy Cross, and lead researcher on the study said that, "the 3-D laser surface scans we made of the fragile dodo skeletons enable us to reconstruct how the dodo walked, moved and lived to a level of detail that has never been possible before. There are so many outstanding questions about the dodo bird that we can answer with this new knowledge." A complete dodo skeleton, found by an amateur collector and barber, Etienne Thirioux, on the island of Mauritius between 1899 and 1917, has remained unstudied, even though it is the only complete dodo skeleton from a single individual bird known to exist. All other skeletons are incomplete combinations, meaning that they are gathered from more than one individual. In addition, Thirioux constructed a second, partially combined skeleton, which contains many bones that also belong to a single bird. "Being able to examine the skeleton of a single, individual dodo, which is not made up from as many individual birds as there are bones, as is the case in all those other combined skeletons, truly allows us to appreciate the way the dodo looked and see how tall or fat it really was," said Juilan Hume, of the Natural History Museum UK, a co-author on the study. The scans were performed on site in Durban, South Africa, and allow examination of the biology of this mysterious extinct bird in detail for the first time. Using the newest digital tools and techniques, the... Question: The researchers study the dodo skeleton to find out _ . Yes or no, is the answer "the dodo's living habits"?

Ans:
Yes