Article: Tears are nature's way of making us feel more comfortable. When our eyes is made uncomfortable by some small pieces of pollution, or when we are cutting onions, or when we are exhausted and "red-eyes" from over work and late hours, tears form in our eyes to clean and refresh them. Tears are also a sign of strong emotion . We cry when we are sad and we cry when we are happy. And tears seem to be uniquely human. We know that animals also experience emotion fear, pleasure, loneliness, but they do not shed tears. Biologically speaking, tears are actually drops of saline fluid, which is a little bit salty, produced by a gland in the body. Because salt is an important component, tears may actually constitute the most conclusive evidence that the human animal is the end product of a long evolutionary process that began in the sea. And it is clear that, in addition to the emotional benefits, the shedding of tears has a specific biological function as well. Through tears, we can eliminate from our body certain chemicals which build up in response to stress and create a chemical imbalance in the body. Crying actually makes us feel better by correcting that imbalance and making us feel good again. And thus the emotional and the biological functions of tears merge into one and make us even more "human" than we would otherwise be. Question: Which of the following is the best title of the passage? Yes or no, is the answer "Tears are always making us feel more comfortable."?
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Article: When young people get their first real jobs, they face a lot of new, confusing situations. They may find that everything is different from the way things were at school. It is also possible that they will feel uncomfortable and insecure in both professional and social situations. Eventually , they realize that university classes can't be the only preparation for all of the different situations that arise in the working world. Perhaps the best way to learn how to behave in the working world is to identify a worker you admire and observe his behavior. In doing so, you will be able to see what it is that you admire in this person. For example, you'll observe how he acts in a crisis. Perhaps even more important, you'll be able see what is his approach to day-to-day situations. While you are observing your colleague, you should be asking yourself whether his behavior is like yours and how you can learn from his responses to a variety of situations. By watching and learning from a model, you'll probably begin to identify and adopt good working habits. Question: The young people just graduated from school may not behave well in the working world because _ . Yes or no, is the answer "what they learn in university classes is not adequate for their new life"?
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Article: Long-time exposure to air pollution can lead to physical changes in the brain and cause trouble in learning and memory, and even anxiety. This is suggested by the results of new research on mice. While other studies have shown the harmful effects of polluted air in the lungs and heart, this is the first to show the negative effect on the brain. The team of Laura Fonken, Randy Nelson , from the Ohio State University, the USA, has spread to the brain a previous line of research which found that fine particulate matter floating in the air mainly because of air pollution caused by humans, causes swelling in much of the body, and may be related to high blood pressure problems, and some other diseases. In the research Fonken and his colleagues exposed mice to polluted air for six hours each day, five days a week, over a period of 10 months, almost half the average life length of mice. Polluted air contains fine particles created by cars, factories and natural dust. Fine particles of this kind are tiny, about 2.5 micrometers in diameter , or about one-thirtieth the width of a human hair. These particles can go deep into lungs and other organs. The concentration of this particulate material to which they exposed mice is equal to the concentration at which people can be exposed in some polluted urban areas. After a period of 10 months, the researchers got the animals to have a series of behavioral tests. Both the behavior of mice and the results of neurological tests done to them show that those within the polluted air had more problems in learning and memory, and higher levels of anxiety. The results suggest that long-time exposure to polluted air can have measurable negative effects on the human brain and can cause a variety of mental health problems. This could have important consequences for those living and working in polluted urban areas. Question: The results of new research on mice first suggest that polluted air mainly does harm to _ . Yes or no, is the answer "mental health"?
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