Ques: I'm taking a test and have to guess the right answer to the question after the article. Article: Squirrels often communicate with whistles, chirps and chucks, which sound like the word "chuck". Whistles and chirps are like the sounds that many birds make.Now scientists have translated some of their squirrel-speak. Hare, a professor of zoology at the University of Maniloha in Winnipeg, and his team managed to record squirrels' alarm calls.The researchers studied the sounds and then played them back to 60 wild squirrels, which the scientists approached individually with a video recorder to capture their reponses.Some squirrels lifted their heads up and became.Alert .Creatures that were more frightened simply ran for their lives and dived into caves. "In effect then, whistles that mix with chucks say 'there's an enemy of average threat that's here', and whistles without chucks say 'there's an enemy of seemingly average threat around here somewhere', while pure chirps say, 'I'm hiding here because there's an immediate danger.' " Hare told.Discovery News. Hare and some other researchers believe such sounds arc part of an advanced language that develops just as all other communication systems. Although squirrels risk their lives when they call out to warn others of threats, other squirrels might admire this behaviour, thus increasingly the caller's social status, like humans who look up to heroes. Hare added that other animals, such as birds, probably understand at least some squirrel language, since they also may benefit from the alarm calls. In fact, another Canadian study found that deep-voiced, black-capped chickadees have their own language too.According to certain research, there are a lot of tidings in chickadees' calls, such as directing fellows' activities, keeping in contact between mates, and raising alarms. While chickadees and other birds are often welcomed into gardens by homeowners, squirrels are frequently viewed as pests . Hare wishes a greater understanding of the complex social lives and communication systems of squirrels will provide "hope that humans will gain a greater appreciation and... Question: What can be learned from this text? Options: A: Squirrels communicate with cach other as humans do. B: Some squirrels understand the recorded alarm calls. C: Other animals also well understand the language of squirrels. D: Birds such as chickadees don't have their own language.
Ans: B

Ques: I'm taking a test and have to guess the right answer to the question after the article. Article: Say you're in the supermarket parking lot, holding your baby, bags of goods, and trying to open your car. A stranger walks up and says,"Here, let me hold your baby."Should you let him? According to a new New York University study, knowing whether or not to trust someone is so important that we can tell whether a face is trustworthy before we even consciously know it's there. The researchers knew from previous studies that people are fairly similar when it comes to how they judge a face's trustworthiness. They wanted to find out whether that would be true if people only saw a face for a quick moment -- an amount of time so short that it would prevent making a conscious judgment. To carry out their study, the researchers monitored the amygdala of 37 volunteers while showing them 300 faces for 33 milliseconds each. Those faces had already been tested with a different set of 10 subjects, who saw them for much longer. In those earlier tests, people agreed about whether to trust each face. In this new study, fascinatingly, different parts of the amygdala lit up when a subject saw an untrustworthy face and a trustworthy one -- and it lit up more when the face in question was suspicious . "Faces that appear likely to cause harm are suddenly tracked by the amygdala, so it could then quickly change other brain processes and make fast responses to people -- approach or avoid,"says Jon Freeman, the study's senior author."Our talents for making instant judgments could either come from birth or be learned from the social environment." So should you trust the guy in the parking lot? Your brain already knows. Question: The amygdala lit up more clearly when people . Options: A: came across a neutral face mask B: saw an untrustworthy face C: met a reliable person D: saw a familiar face
Ans: B

Ques: I'm taking a test and have to guess the right answer to the question after the article. Article: Vegetable may aid the brain A study suggests certain vegetables such as broccoli and spinach might help older women keep their minds sharp. Researchers have discovered that women in their 60s who eat more green leafy vegetables show less signs of mental decline over time, reported Wednesday's CRI online. They gave participants a bundle of tests measuring memory, oral ability and attention. The study didn't include men, but researchers say a similar diet would likely have the same results. Eating fish can cut risk of heart rhythm disorder . US scientists have found that eating fish can reduce the risk of deadly heartbeat disorders. They say baked fish can effectively reduce the risk of atria fibrillation among older men and women, reported Tuesday's CRI online. Researchers say in their 12 years of research among 4,800 people over the age of 65,they found those who ate fish one to four times per week had a about 30 percent lower risk compared with those who ate fish less than once a month. They say the pmega-3 fatty acids in fish can reduce the risk of a range of heart disorders and is _ to brain development and function. More than 2 million Americans are affected by atria fibrillation, a chronic condition that causes shortness of breath and an inability to exercise. Red wine may extend life US scientists have found that a mixture that makes red wine a healthy drink may also hold the secret to a longer life. They say antioxidant in wine acted on fruit flies and worms in the same way as a method known to extend the life of many animals, which is by sharply limiting how much they eat.CRIENGLISH.com reported Thursday. Limiting calories has been shown to make animals such as dogs and monkeys live longer, but they are often tired and lose productivity. The researchers will begin testing the mixture in mice, which are considerably closer to humans biologically. Question: The text is most likely to be published in _ . Options: A: a story book B: an advertisement C: a scientific journal D: a textbook
Ans: C

Ques: I'm taking a test and have to guess the right answer to the question after the article. Article: Trees are useful to man in three important ways: They provide him with wood and other products; they provide him shade;. and they help to prevent droughts and floods. Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important.In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear. This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil allowing the rain to sink in and also bind the soil, thus preventing it from being washed away easily;but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When the top-soil is gone, nothing remains but worthless desert. Two thousand years ago,a rich and powerful country cut down its trees to build warships, with which to gain itself an empire .It set up the empire, but, without its trees, its soil became poor and grew weak. When the empire fell to pieces, the home country found itself faced by floods and starvation . Question: The most important service of trees to man is that _ . Options: A: they give them wood and other products B: they give them shade C: they help him prevent droughts and floods D: they help him made money
Ans:
C