I'm taking a test and have to guess the right answer to the question after the article. Article: FOR most people, life without plants is unimaginable. They feed us, clean up our air and brighten up our gardens. But what if someone told you that even our smartphones can benefit from plants? Meet the scientists from the Freiburg University of Mining and Technology in Germany. According to reports from Reuters, they have come up with a way to take the important element germanium from plants. The element was first discovered in Germany (hence the name) and was used to develop the first transistor because it can transport electricity very quickly. Nowadays, silicon-germanium alloy plays an important role in making computers, smartphones and fiber-optic cables . Although germanium can be found in soil around the world, it is difficult to extract . In the traditional process, people take the material after zinc mining or burning coal. But the Freiburg scientists decided to fall back on the natural world. Biology professor Hermann Heilmeier is one of the scientists who are using common plants for this uncommon process. "Different energy crops are being planted, for example, sunflowers, corn ... we want to use them for phytomining. In German we call it 'mining with plants'." Others have used this method in the past with metals like gold and copper . But in their study, the Freiburg scientists brought germanium from the soil into the roots and shoots of the plants, harvested them and then took the element from the plants. The process did not cost too much because germanium can be taken after plants are processed for use as biogas . So many of the costs are already covered in existing biogas plants. However, there is still a lot of work to do before we can all experience the benefits. At the moment germanium can only be harvested in very small amounts, just a few milligrams per liter. Now scientists are working on different plants to improve this. "As is so often the case, industry is still waiting because they want to see everything already working. Then they say, 'We'll have it.' But of course we have... Question: Which of the following statements would Professor Martin Bertau agree with? Options: A: Many businesses have already started contributing money to this research. B: Industry and science have stronger and closer connections than is generally expected. C: People from related industries showed no interest in extracting germanium from plants. D: Germanium has to be extracted from plants in large quantities before this type of extraction becomes industrialized.
D

I'm taking a test and have to guess the right answer to the question after the article. Article: At railway stations all across Britain next week, groups of students will gather with their backpacks to wait for the trains that will carry them home for Christmas. This is as large a movement of human beings as before, but with more contradictory traffic flows, so that trains filled with the young pass each other travelling in every direction. At first, I went home every weekend with my washing, but then those visits became less regular. How did I let my parents know I was coming? They had no phone. Perhaps I wrote to them ("Expect me with dirty shirts this Friday afternoon"), but more likely I didn't let them know, and just turned up or didn't turn up, not understanding that my parents' dashed hopes of seeing me were a greater casualty of my carelessness than a spoiled tea. And in all this I suspect I was typical, at least of young men. As for our fathers and mothers, none of them talked of "empty-nest syndrome", even though its implication that the principal human duty is to protect and feed the young would have suited their generation better than ours. Then, the feelings of loss went without a name. Today, it's a condition with _ , which will make parents feel more enjoyable in their life. The Mayo Clinic, for example, suggests you try to maintain regular contact with your children through "visits, phone calls, emails, texts or video chats". If you feel depressed, lean on loved ones or your mental health provider. Above all, stay positive: "Thinking about the extra time and energy you might have to devote to your marriage or personal interests after your last child leaves home might help you adapt to this major life change." What can't be denied, however, is that children often leave home. In modern societies, this is what they do. Christmas is the very time they can be depended on to return. For the non-religious, that may be this season's true comfort and significance. Question: From the passage we can infer that by writing the article the writer's purpose is to _ . Options: A: persuade the young to show concern for their parents B: ask the young to go home regularly C: make the young understand their parents' interests D: enable the young to be more independent
A

I'm taking a test and have to guess the right answer to the question after the article. Article: Teenagers who spend hours in front of the television may have a poorer diet as young adults. A study, which included nearly 1,400 high school students, found that those who watched TV for five hours or more per day had less healthy diets than their peers five years later. Why does this happen? Should the parents take any measures? On the one hand, people who spend a lot of time in front of the TV, especially teenagers may snack more, and that may affect their long-term diet quality. On the other hand, TV ads for fast food, sweets and snacks tempt teenagers to eat more of those foods. And TV time might also replace exercise time for some kids. Lead researcher Dr. Daheia J. BarrAnderson, of the University of Minnesota in Minneapolis, told Reuters Health a clear correlation between TV time during high school and diet quality in young adulthood . While the heaviest TV viewers were eating the most junk food five years later, those who'd watched less than two hours per day had the highest intake of fruits, vegetables, whole grains and high-calcium food. In her opinion, parents should limit and monitor TV viewing. I think children should watch no more than two hours of television per day. And parents should set a good example by eating right, being physical active and curbing their own TV time. Question: According to the passage, heavy TV viewers tend to _ Options: A: eat more fruits B: eat less junk food C: take in fewer vegetables D: take in high-calcium food
C