Read the article and select the best answer. Article: Have you ever been in a situation, where you felt uneasy because of something you think you may have forgotten to do or perhaps a feeling that you annoyed someone whom you wanted to get along with really well. If you have experienced such feelings and worse on a regular basis, then you most probably are a victim of anxiety attacks. All of us, to some extent, have experienced anxiety at different levels. There are somethings you may know about anxiety, and some things that you may not be familiar with. So in order to be prepared for your unexpected feeling of anxiety, you need to get to know what anxiety is before it _ into a panic attack. Anxiety is simply the feeling of discomfort, uneasiness or fear of what may eventually happen resulting from an imagined, or a real threatening condition. On the extreme end panic attacks can occur due to heightened feelings of anxiety. There are two main symptoms during an anxiety / panic attack and these are physical and emotional symptoms. Physical symptoms include difficulty in breathing, shaking, direct feeling of heat, rapid heartbeat and tiredness while emotional symptoms deal with worrying, depression, fear, and lack of focus. In spite of the negative impression we have for anxiety, it is not dangerous in any way whatever. The feeling of anxiety is not bad, in fact it's more of a defensive feeling which protects us from possible danger by engaging a response within us in fight or fight situations. So it's not the "bad guy", you just have to learn how to control it. Panic attacks, however, are far more dangerous and should be a concern to your health. Panic can sometimes result in blurred vision, difficulty in breathing due to a tight chest. The best way to different anxiety from any serious illness is to ask a medical expert for advice on a regular basis. Question: A victim of anxiety attacks may have the symptoms that _ . Options: A: he doesn't want to have anything to eat B: he has trouble in hearing and vision C: he is always worried about others D: he can't pay attention to what he does
D

Read the article and select the best answer. Article: People who enjoy a dream-filled sleep are better at recalling information and making links between facts when they wake, scientists found. But recharging with a shallow nap offers no such mental improvement, the research suggests. The results of the study add to the evidence that Rapid Eye Movement (REM) sleep is very important to the brain's ability to strengthen memories. An average night's sleep includes four or five periods of REM sleep, but these tend to be longer towards the end of the night. This means that adults who get less than the recommended seven to eight hours a night -- and therefore inadequate REM sleep -- may be damaging their mind's ability to form strong memories. Although REM sleep is not classified as a type of deep sleep, it is only reached after the brain has passed through deep sleep stages. In the most recent study, participants were shown groups of three words -- such as "cookie", "heart", and "sixteen" -- and asked to find another word that can be associated with all three words. In this example, the answer would have been "sweet". They were tested once in the morning and then given the same task again in the afternoon. In between, some were allowed a nap with REM sleep, some a nap without REM sleep, while the others had a quiet rest period. The quiet rest and non-REM sleep groups showed no improvement in their test results, but the REM sleep group improved on their morning performance by an average of almost 40 percent. Dr Sara Mednick, a sleep researcher at the University of California who led the study, believes the formation of connections between previously unassociated information in the brain -- which leads to creative problem-solving -- is encouraged by mental changes which occur during REM sleep. People woken while their closed eyes made rapid movements recalled much more color1ful and detailed dreams than people woken during other stages of sleep. Question: According to the passage, to have a good memory, a person had better _ at night. Options: A: sleep four to five hours at most B: sleep as much as possible C: have a shallow sleep D: sleep with four or five periods of REM
D

Read the article and select the best answer. Article: NASA on September 28, 2015 announced the strongest evidence yet for liquid water on the red planet, increasing the possibility that astronauts journeying to Mars could someday rely on the planet's own water for their drinking needs. You may feel like you've heard about the hunt for liquid water on Mars before--and the researchers involved know it may seem played out. But science has yet to truly prove that water flows on Mars once and for all, and doing so could completely change the way we view the planet. This new data is a big step in the right direction. "Liquid water is an attractive topic, and we like the thousandth time someone has discovered water on Mars," Lujendra Ojha, the Georgia Tech PhD candidate who led the research announced Monday, told The Post. But there's a good reason that liquid water is so "attractive": Mars is now the only planet in our solar system to show evidence of the stuff on its surface, other than _ . Other worlds have it in subsurface oceans, or scattered around as vapor in the atmosphere. But Mars is the only place where we have solid evidence for liquid that sits right there in the open air. While it would be a major leap to suggest that Mars might harbor life--even microbial life--liquid water at least makes it possible that parts of the planet are habitable. The study builds on research from April, when scientists using data from the Curiosity rover noted that the planet had the seasonal potential for liquid water. We know that because of the extremely low pressure on Mars, water has a boiling point of just a few degrees Celsius, after which it evaporates. The April study noted the presence of perchlorates --a kind of salt--which could make the boiling point of Mars' water much higher, theoretically allowing it to remain liquid. They affirmed that the planet's temperature would be right for liquid, perchlorate-filled water to form every day during winter and spring. Question: What plays an important role in making Mars' water in the state of liquid? Options: A: The thick atmosphere around Mars. B: The physical structure of Mars. C: The extremely low pressure on Mars. D: Perchlorates in Mar's water.
D