(Question)
Read the following article and select the best answer. Article: Three Yale University professors agreed in a discussion that the automobile was what one of them called "Public Health Enemy No. 1 in this century". Besides polluting the air and overcrowding the cities, cars are involved in more than half the disastrous accidents, and they contribute to heart disease "because we won't walk anywhere any more," said Richard Weeinaman, professor of medicine and public health. Speaking of many of those man-made dangers of the automobile, Arthur W. Galson, professor of biology, said it was possible to make a kerosene-burning turbine car that would "lessensmog by a very large factor". But he expressed doubt whether Americans were willing to give up moving about the countryside at 90 miles per hour in a large vehicle. "America seems wedded to the motor car--every family has to have at least two, and one has to be a convertible with 300 horsepower," professor Galson continued. "Is this the way of life that we choose because we treasure these values?" For professor Sears, part of the blame lies with "a society that regards profit as a supreme value, under the illusion that anything that's technically possible is, therefore, morally justified". Professor Sears also called the country's dependence on its modern automobiles "terrible economics" because of the large horsepower used simply "moving one individual to work". But he admitted that Americans have painted themselves into a corner by allowing the national economy to become so dependent on the automobile industry. "The solution," Dr Weeinerman said, "is not finding a less dangerous fuel but a different system of inner city transportation. Because of the increasing use of cars, public transportation has been allowed to wither and grow worse, so that if you can't walk to where you want to go, you have to have a car in most cities," he declared. This, in turn, Dr Weeinerman contended, is responsible for the "arteriosclerosis " of public roads, for the pollution of the inner city and for the middle-class movement to the suburbs. Question: The main idea of the passage is that _ . - Americans are used to travelling by cars - American public transportation is growing worse - American car industry caused disastrous road accidents - American people's health is threatened by automobiles
(Answer)
American people's health is threatened by automobiles

(Question)
Read the following article and select the best answer. Article: Contrary to popular belief, looking at someone's face alone is not enough to tell us whether they are roaring in celebration or screaming in frustration, researchers claimed.While people may believe they have the ability to read each other's faces, body language is the real clue that shows whether strong emotions someone is feeling are positive or negative. In a study, groups of participants were shown a series of facial expressions such as tennis players photographed just after winning or losing a point. In some cases the volunteers were able to see the player's full body, but in others they were only shown either their face or their body with the other removed. Participants could clearly tell whether the players were winning or losing when they were shown the full picture or just the body, but their guesses were no better than chance when based on the face alone. Those who were allowed to see the full image were convinced they had made their judgment based on the players' facial expressions even though results from the two other groups suggested otherwise. The researchers carried out a second study where participants were shown a wider range of faces showing emotions including joy, pleasure, victory, pain and defeat. Using photoediting software, the researchers attached the faces to bodies expressing the opposite emotion, and asked participants to act out the emotions they saw in the photos. The resulting poses were like the body poses in the photographs but not the facial expressions, demonstrating that people base their interpretation of strong emotions not on the face but the body. Dr Aviezer, who led the study, said, "These results show that when emotions become extremely intense, the difference between positive and negative facial expressions becomes unclear.The results may help researchers understand how our body interacts during emotional situations.For example, individuals may fail to recognize facial expressions, but if they are trained to process important body language, their performance may... Question: What do we know about the first study? - The participants were divided into four groups. - All participants were given the same pictures to see. - It proved that emotions influence people's body language. - Participants could tell the players' feelings when seeing the full picture.
(Answer)
Participants could tell the players' feelings when seeing the full picture.

(Question)
Read the following article and select the best answer. Article: Millions of people die of hunger in southern Africa every year, but when Zambia was offered thousands of tons of free maize by the US, the government politely said no. "We don't know whether the food is safe," said Zambia's commerce, Trade and Industry Minister Dipak Patel. His worries are shared by countries around the world that are in two minds about America's genetically modified(GM,)crops.Just last week, EU member nations were discussing whether or not to import GM sweet corn from the US. Ever since people started farming, they have tried to crossbreed plants to make them stronger or better tasting. At one time, only related plants could be crossed with each other. But when GM techniques were developed in the 1970s, scientists were able to put a single gene from a living creature into an unrelated creature. This means they can make crops more productive and resistant to disease by adding genes from other species.They can also create food with special characteristics, such as "golden rice", which is enriched with vitamin A. But many people believe GM foods are a health risk. At the moment, the official argument is that GM foods "are not likely to present risks for human health". But there are still many questions to be answered as the foods are produced in different ways. Some experts believe the genetic material added to plants can transfer to humans and give damage to our bodies. Further harm could be caused by the genes from GM plants crossbreeding with naturally produced crops. People in China are also getting worried about GM foods. More than 70 percent of the country's soybean oil is produced from imported GM soybeans. Meanwhile, an investigation last November found that 12 of 60 famous foods sold across the country were GM products. The government has begun to introduce a marking system for GM goods so that people can choose whether or not to eat them. Question: Why has Zambia refused the American free maize? - they decide to follow EU member's advice - they are concerned about the safety of GM foods - they care little about the problem of starvation - they are too proud to accept free offer
(Answer)
they are concerned about the safety of GM foods