Read the following article and select the best answer. Article: Feeling tired lately? Has a doctor said he can't find anything wrong with you? Perhaps he sent you to a hospital, but all the advanced equipment there shows that there is nothing wrong with you. Then, consider this: you might be in a state of subhealth. Subhealth, also called the third state or gray state, is explained as a borderline state between health and disease. According to the study by the National Health Organization, over 45 percent of subhealthy people are middle-aged or elderly. The percentage is even higher among people who work in management position as well as students around exam time. Symptoms include a lack of energy, depression, slow reactions, sleeplessness, anxiety, and poor memory. Other symptoms include shortness of breath, sweating and aching in the waist and legs. The key to preventing and recovering from subhealth, according to some medical experts, is to form good living habits, alternately work with rest, exercise regularly, and take part in open air activities. As for meals, people are advised to eat less salt and sugar. They should eat more fresh vegetables, fruits and fish because they are rich in nutritional elements-vitamins and trace elements that are important to the body. Nutrition experts point out that it is not good to eat too much at one meal because it may cause unhealthy changes in the digestive tract . They also say that a balanced diet is very helpful in avoiding subhealth. Question: As for food, experts suggested that_. - we should never eat meat - we should eat more meat - we should have meals with less salt and sugar - We should have meals without salt or sugar
we should have meals with less salt and sugar

Read the following article and select the best answer. Article: For millions of years, sharks have been the kings of the oceans, the top of the food chain. But these days, the hunter has become the hunted, because of better methods from commercial fishermen who are looking for fins to make expensive soup sold mostly in Asia. Shark fins are far more valuable than shark meat, so fishermen cut the fins off live fish and throw the sharks overboard to maximize the catch they bring back. Shark finning is illegal in the United States, but there're tournament sport fishermen, who target and kill the biggest ones they take from the sea. These tournaments, the prizes of which can reach $5,000 or more, attract large crowds of anglers but also draw protests from animal rights groups and environmentalists. The competitors say they are enjoying a fun and legal sport, the impact on the overall shark population is very small, and most of the sharks caught are returned to the ocean. Dave Johnson, who is from Kennebunkport, Maine, said no one ever comes close to the limit set by the government of killing one shark per day during the three-month season. "I enjoy watching these animals, but I also enjoy catching and releasing them, and very rarely killing them and eating them," he said. "If I thought killing one shark was endangering the species and contributing to their decline I'd stop doing it tomorrow." That is exactly what marine biologists like Luke Tipple want to happen. "I believe that they should just stop it. In fact, we don't need to be targeting, in any way, any of these threatened populations," he said. Up to 73 million sharks are killed annually, and many species are at risk of extinction . Question: In Tipple's opinion, _ . - no shark should be caught or killed - the tournaments should target common species - sport fishermen should release sharks in time - more strict limits should be set by the government
no shark should be caught or killed

Q: Read the following article and select the best answer. Article: They said highly anxious rats which were kept had very low levels of a brain chemical called fibroblast growth factor 2 or FGF2, compared with rats that were more relaxed. But when they improved the anxious rats' living conditions -- giving them new toys to explore and a bigger cage to live in -- levels of this brain chemical increased and they became less anxious. "The levels of this brain chemical increased in response to the experiences that the rats were exposed to. It also decreased their anxiety". Javier Perez of the University of Michigan said in a telephone interview. "It made them behave the same way as the rats that were relaxed", he said. In a former study of people who were severely depressed before they died, the team found the gene that makes FGF2 was producing very low levels of the growth factor, which is known primarily for organizing the brain during development and repairing it after injury. Perez thinks the brain chemical may be a marker for genetic vulnerability to anxiety and depression. But it can also respond to changes in the environment in a positive way, possibly by preserving new brain cells. While both the calm and anxious rats produced the same number of new brain cells, these cells were less likely to survive in the high-anxiety rats, the team found. Giving the rats better living conditions or injecting them with FGF2 helped improve cell survival. "This discovery may pave the way for new, more specific treatments for anxiety that will not be based on sedation , but will instead fight the real cause of the disease," Dr. Pier Vincenzo Piazza from France said in a statement. Question: What's the better way to increase the levels of FGF2? - Introducing more companions to the anxious rats. - Improving the living conditions of the anxious rats. - Injecting the anxious rats with some special medicine. - Giving the anxious rats more time to relax.
A: Improving the living conditions of the anxious rats.

(Q).
Read the following article and select the best answer. Article: After many years on the endangered list of animals, Japan'sAmami Black rabbit can finally breathe a sigh of relief -- That's because this year, the rare animal is no longer in danger of dying out! The effort to save the dark-furred rabbit, often called "a living fossil", began in 1921, when the Japanese government promoted it to the status of "natural monument". This meant that it could not be hunted down for food. However, when that did not work, it got yet another promotion to "special natural monument", which meant that the rabbit could not be trapped or hunted. While that helped, it was not enough -- By 2004 with only 2,000-5,000 specimen left in the wild, the Amami rabbit was officially declared endangered! The reason for the serious population decrease was due to loss of habitat caused by forest clearing for home and agriculture use and the introduction of a new species not native to the island -- the Mongoose. Brought in to get rid of the snake population, the Mongoose instead seemed to prefer the black rabbit. In 2005, the government carried out a strict mongoose capture order and slowly but surely, the rabbit started to come back. This rabbit live in a rather unusual lifestyle. Its ideal habitat is a forest that features both trees and large grasses -- the former to find acorns to feed on and the latter, to hide its babies. That's because to protect them from being eaten by their enemies, the Amami rabbit buries them deep into the ground among the grasses and covers them up with dirt during the day. Then, in the middle of the night, still keeping a _ eye out for their enemies, it digs them out from their hiding place and feeds them. No wonder the animal is sometimes called "midnight rabbit". Though many measures have been taken to stop this furry animal from being wiped out from the world, there are many more that are still in danger. We surely hope that officials in other parts of the worldtry their best to save the endangered species. Question: The status of "natural monument" means _ . - you can't kill them - you can't capture them - you can't catch them for food - you can't trap or hunt them
(A).
you can't catch them for food