Q: Read the following article and answer the question. Article: New experiments discover rats showing sympathy and helping other rodents .It is a characteristic some scientists thought was reserved only for humans and higher animals. In repeated tests, rats freed another trapped rat in their cage, even when yummy chocolate served as an attraction.24 of the 30 rats opened the trap by pushing in a door.The rats could have eaten the chocolate before freeing their partners, but often didn't, choosing to help and share the goodies. "Basically they told us freeing another rat is as important as eating chocolate," said study author Peggy Mason of the University of Chicago."That's a very striking thing." In some cases, the rats first took the chocolate chips out of a container, but didn't eat them, then freed the other rat and shared "almost as if they were serving them chocolate," Mason said.The research is reported in Thursday's journal Science. Also, females showed more consistent care and help than males, Mason said.All six females freed their trapped partner while three quarters of the 24 males did so.This confirms other studies that show females showing more pro-social behavior than males.There were time when the male rats took the day off from helping their trapped partner, but the females never did, she said. Jeff Mogil at McGill University in Canada, who wasn't part of the study, said it was a little surprising but even more convincing. Both scientists said social understanding is probably a characteristic that is important in the evolution of animals. Mason joked that if rats can be so caring and helpful, "there's a sense of optimism.It's something we could be." Question: What's the difference between the behavior of male and female rats? Answer:

OPTIONS:
- Female rats showed more concern about their trapped partners.
- Male rats cared more about their trapped partners than females.
- Female rats behaved less pro-socially than male rats on the whole.
- Male rats didn't go away from their trapped partners for even a day.

A: Female rats showed more concern about their trapped partners.

Q: Read the following article and answer the question. Article: Elderly adults who regularly drink green tea may stay more agile and independent than their peers over time, according to a Japanese study that covered thousands of people. Green tea contains antioxidant chemicals that may help stop the cell damage that can lead to disease. Researchers have been studying green tea's effect on everything from cholesterol to the risk of certain cancers, with mixed results so far. They found those who drank the most green tea were the least likely to develop "functional disability", or problems with daily activities or basic needs, such as dressing or bathing. Specifically, almost 13 percent of adults who drank less than a cup of green tea per day became functionally disabled, compared with just over 7 percent of people who drank at least five cups a day. The study did not prove that green tea alone kept people agile as they grew older. Green-tea lovers generally had healthier diets, including more fish, vegetables and fruit, as well as more education, lower smoking rates, fewer heart attacks and strokes, and greater mental sharpness. They also tended to be more socially active and have more friends and family to rely on. But even with those factors accounted for, green tea itself was tied to a lower disability risk, the researchers said. People who drank at least five cups a day were one-third less likely to develop disabilities than those who had less than a cup per day. Those people who averaged three or four cups a day had a 25 percent lower risk. Although it's not clear how green tea might offer a buffer against disability, Tomata's team did note that one recent study found green tea extracts seem to increase leg muscle strength in older women. While green tea and its extracts are considered safe in small amounts, they do contain caffeine and small amounts of vitamin K, which means it could affect drugs that prevent blood clotting . Question: What can be learned from the passage? Answer:

OPTIONS:
- Antioxidant chemicals can lead to disease.
- Those who often drank green tea can't develop "functional disability".
- "Functional disability" is related to problems with daily activities or basic needs.
- People who drank at least five cups a day are not likely to become functionally disabled.

A: "Functional disability" is related to problems with daily activities or basic needs.

Q: Read the following article and answer the question. Article: Australia said on Friday that it had done enough to prevent the UN from listing the Great Barrier Reef ,the world's biggest coral reef ecosystem ,as being'in danger'* The Great Barrier Reef covers an area of 348,000 square kilometers off Australia's east coast and ontains some 2,500 smalll reefs.Its width ranges between 60 and 250 kilometers.It is a collection of ore than 2 , 900 coral reefs,600 continental islands,and thousands of sea species ,making it one of the world's most complex and varied ecosystems. It was listed as a World Heritage Site in 1981 .But in 2011 UNESCO declared"extreme concern"at the approval of natural gas processing and port facilities within the site and afterwards warned the reef could be considered"in danger".Worried about planned coastal developments,including ports,UNESCO is set to announce overnight a draft decision on the site,which is rich in sea life. "They can see we are doing real work to improve the reef,"Environment Minister Greg Hunt told the Australian Broadcasting Corporation."I firmly believe that we're making once in a century changes to ensure that a century from now,the reef won't just be as it is,but will be better and stronger than it has been since European settlement." Australia has recently ordered a ban on the century-old practice of emptying dredge waste which environmentalists smakes corals and seagrasses die because of lack of airacross most of the reef,and funded efforts to improve water quality. Queensland State,the gateway to the reef,has also promised to introduce laws to limit port develop ment as it balances environmental concerns with the needs of the resources industry Question: What can be inferred from Greg Hunt's words? Answer:

OPTIONS:
- .Much remains to be done for Australia to save the Reef.
- .Australian government is on good terms with UNESCO.
- .Australia is confident that the Reef is not"in danger",.
- .Australia has done too much to protect the Reef .

A:
.Australia is confident that the Reef is not"in danger",.