Read the following article and select the best answer. Article: A recent National Public Radio program examined the disappearance of some of the first words we were probably taught - "please" and "thank you." Other polite phrases are also disappearing. "You're welcome" has been replaced by "sure," "no problem," "you bet" or "enjoy." Are we becoming ruder, or are patterns of speech merely updating for changing times? Peter Post, director of the program, argues about people stopping using "you're welcome". He says, "Thank you" is an expression of appreciation one person offers another. To respond "No problem" is to ignore this acceptance as really being undeserved. By responding with a simple "you're welcome," Post adds, a person admits the thanks and shows appreciation for the person giving it. Whatever polite vocabulary you believe is fading, sociologist Gregory E. Smith says that such fading is a sign that we're becoming ruder as a society. "Saying please and thank you, asking permission, offering help, and following up on solutions to problems are no longer as important," he says. In 2011, 76 percent of people surveyed said Americans are becoming less civil. But could it be that it's simply the words we're using that are changing? Actually, the principles of respect, consideration and honesty are universal and timeless, but manners do change. For example, it's important to greet people when you see them, though the form of greeting has changed over time. "How do you do," for instance, became "Hello, how are you?" which changed into "Hello, how are things," or "How's it going?". As for "no problem", if the appreciation is expressed in a sincere manner, many Americans think they do not see its use as a loss of politeness. Question: Peter Post thinks using "You're welcome" to reply to "Thank you" is _ . - more appropriate - a bit outdated - less polite - really undeserved
more appropriate

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Read the following article and select the best answer. Article: "The world's oceans are slowly getting more acidic." say scientists. The researchers from California report that the change is taking place in response to higher levels of carbon dioxide in the atmosphere. The lowering of the waters' PH value is not great at the moment but could cause a serious threat to current ocean life if it continues, they warn. Ken Caldeira and Michael Wickett, from the Lawrence Livermore National Laboratory, report their concerns in the journal Nature. Increasing use of oil fuels means more carbon dioxide is going into the air, and most of it will eventually be absorbed by seawater. Once in the water, it reacts to form carbonic acid. Scientists believe that the oceans have already become slightly more acidic over the last century. These researchers have tried to predict what will happen in the future by combining what we know about the history of the oceans with computer models of climate change. "This level of acidity will get much more extreme in the future if we continue releasing CO2into the atmosphere," said Dr Caldeira. "And we predict the amount of future acidity will exceed anything we have seen over the last several hundred million years." However, it is not ly clear what that means for ocean life. Most organisms live near the surface, where the greatest PH change would be expected to occur, but deep-ocean life forms may be more sensitive to PH changes.Coral reefs and other organisms whose shells contain calcium carbonate may be affected if the water's acidity levels keep going up, the team predict. In recent years some people have suggested storing carbon dioxide from power stations in the deep ocean as a way of dealing with global warming.But Dr Caldeira said that such a strategy should now be re-considered. "Previously, most experts had looked at ocean absorption of carbon dioxide as a good thingbecause in releasing CO2into the atmosphere we warm the planet, and when CO2, is absorbed by the ocean, it reduces the amount of greenhouse warming." Question: The purpose of this passage is to _ . - show people the findings of a research team - inform people of how acid the ocean is now - introduce Dr Caldeira and his team's research - warn people of the higher level of CO2
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warn people of the higher level of CO2

Ques: Read the following article and select the best answer. Article: Air pollution is one of the hottest topics at present because poor air quality is an important factor in both the incidence and cause of respiratory diseases. Zhong Nanshan, a deputy to the NPC and a member of the CAE, said recently when the concentration of PM2.5 rises by 10 micrograms per cubic meter, hospitalization may rise by as much as 3.1 percent. Meanwhile, when the concentration of PM2.5 rises from 25 mgs per cubic meter to 200, the average daily death rate may rise to 11 percent. Zhi Xiuyi, a leading expert in lung cancer treatment and also vice-president of the CATS, said medical authorities used to focus on tobacco control as a primary means of preventing lung cancer. "But in fact, air pollution is no less harmful than smoking and our research team released a report earlier this year showing that the cancer rate in Beijing is closely related to industrialization," he said. The report, conducted by the Beijing Institute of Cancer Research, shows that the number of cancer patients in China has increased markedly during the past ten years. Chaoyang District, the city's main area of industrialization, has the highest incidence of cancer, almost double that of Yanqing, an area on the outskirts of the city. About four out of 1000 Chaoyang residents have some form of the disease, with lung cancer at the top of the list. "The risk of having cancer largely depends on the length of exposure and the concentration of noxious gases ," said Zhi. In response to the doubt whether seven years' exposure to poor air quality will almost result in cancer, Zhi said the time scale was taken from research overseas that suggested the rate of incidence generally peaked in the seventh year of exposure to a heavily polluted environment. Question: What can you infer from the passage? - Industrialization has its weakness as well as strengths. - The average death rate rises with different ages and places. - The air in Beijing is much more polluted than that in the other cities. - The more heavily-polluted air you breathe in, the sooner you'll have cancer.
Ans: The more heavily-polluted air you breathe in, the sooner you'll have cancer.

Ques: Read the following article and select the best answer. Article: It is not clear who first fried potatoes in hot oil. However, it is widely agreed that French fries were prepared as early as the 1700s in Europe. Most people believe that it was the Belgians , instead of the French, who invented "French"fries. They think that French fries got this name from the cooking word "to french" --- to cut green beans into long thin strips . When Thomas Jefferson traveled to France, he enjoyed the deep-fried potatoes very much and brought them home with him. Ever since he served French fries to his guests at a Whitehouse dinner in 1802, the dish has become very popular in America. In the summer of 1853, an American Indian called George Crum worked as a cook at Moon Lake Lodge, a hotel in Saratoga Springs, New York. He was good at making French fries. One evening, a dinner guest found Crum's French fries too thick and sent them back to the kitchen. Crum then cut and fried some thinner French fries, but _ . This time, the cook got angry. So he decided to play a trick on the guest. He finally made fries that were too thin to eat with a fork. To his surprise, the guest loved the browned, paper-thin chips. The browned chips, then called Saratoga Chips, became one of the most popular dishes of the hotel. Soon they were being sold, first in local restaurants, then throughout New England. Question: How were Saratoga Chips invented? - They were introduced by Thomas Jefferson. - A guest told a cook how to make the chips. - A cook made them only to play a trick on a guest. - A cook invented them in order to attract more guests.
Ans:
A cook made them only to play a trick on a guest.