Sports can help you keep fit and get in touch with nature.However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment. Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water.Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses in good condition.This causes major environmental effects.For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas. There are many environment-friendly sports. Power walking is one of them that you can take up today. You don't need any special equipment except a good pair of shoes; and you don't have to worry about resources and your purse.Simple and free, power walking can also keep you fit.If you walk regularly, it will be good for your heart and bones.Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control. Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials.But the final goal should be "green gyms".They are better replacements for traditional health clubs and modern sports centers.Members of green gyms play sports outdoors, in the countryside or other open spaces.There is no special requirement for you to start your membership.And best of all, it's free. The author thinks the golf is resource-hungry because of the following EXCEPT that _ . A) Golf wastes large areas of countryside B) Golf runs out of much water C) Keeping golf court in good condition needs too much energy D) Golf is bad for people's health
D
Technology is changing our lives. Our present aerospace companies are gradually disappearing as private space concerns are being born every day. I'm going to discuss three spacebased businesses that are sure to soon influence us all. First we have to make space travel cheaply and safely. Engine design is the main challenge. To make money in space, the cost of space travel will have to diminish . This problem will be the most difficult to solve. Liquid fueled rockets are the only way to get out of Earth's orbit. Finding new ways to power the flight to space is also another big challenge. Finding the key to cheap space travel might be the biggest story of our times. There are a lot of great minds working on this problem. And companies are pouring money into research and development. In the next few years we'll see the first suborbital tourist. And not long after that we should really start to see new and exciting things as competition heats up. Spacecraft design and production will naturally follow rocket technology. All sorts of crafts will be needed for the wide uses they'll be tasked with. Several companies in the United States have already made small, lowcost test vehicles. Resources in space will provide great mining profits to those who can afford the cost of setting up such a huge operation. Can you imagine finding a huge asteroid of pure gold? The benefit to mankind is limitless. Mining on other planets, like Mars, also adds CO2 into the very thin atmosphere. Over time this can lead to the formation of an atmosphere similar to Earth's. Space is going to offer us untold opportunity and wealth. But this is only going to occur if wealthy investors step forward and fund the first steps forward. It is certain that technology will take us to worlds we could never have imagined. According to the passage, the spacebased businesses are _ . A) likely B) imaginary C) unbelievable D) valuable
A
Q: It is well-known that twins are closer to each other than most brothers and sisters ---- after all, they probably spend more time with each other. Parents of twins often notice that they develop special ways of communicating: they invent their own words and one can often finish the other's sentence. In exceptional circumstances, this closeness becomes more extreme: they invent a whole language of their own, as in the case of Grace and Virginia Kennedy from Georgia in the USA, who communicated so successfully in their own special language that they did not speak any English at all until after they started school. However, these special relationships are the result of lives spent almost entirely in each other's company. What happens when twins do not grow up together, when they are separated at birth for some reason? Are they just like any other strangers, or are there still special similarities between them? Professor Tom Bouchard, of the University of Minnesota, set out to find the answer to this question. He traced sixteen pairs of twins, who were adopted by different families when they were babies, and often brought up in very different circumstances. Each twin was then interviewed about every small detail of their life. The results of this research make a surprising reading. Many of the twins were found to have the same hobbies, many have suffered the same illnesses, and some have even had the same type of accident at the same point in their lives. One pair of middle-aged women arrived for their first meeting in similar dresses, another pair were wearing similar jewellery. The most incredible similarities are to be found in the case of Jim Springer and Jim Lewis from Ohio in the USA. The story of the 'Jim Twins' made headline news across USA. Born to an immigrant woman in 1939, and adopted by different families at birth, both babies were named Jim by their new parents. But what can be the explanation for these remarkable similarities? Is it all pure coincidence, or is the explanation in some way genetic?... According to Tom Bouchard's research, the special similarities between twins _ . A) depend on what the twins enjoy and suffer from B) can not be proved or accepted by all the experts C) result from the twins' growing up and development D) are not closely linked with where the twins are raised
A: D
*Question*
A high school in Hiroshima City has been the first to do something with DNA in the world. Its students have won praise not only for doing this research but also for presenting their findings to groups of expert scientists. The school is one of the Super Science High Schools allowed by the Ministry of Education, Culture, Sports, Science, and Technology, where students are given an opportunity to study science at an advanced level. Here, students use the same type of hitech experimental laboratories as those found at universities. In these labs, they conduct experiments and research in new fields of study not found in textbooks. As part of this science course, the students, with the help of Hiroshima University, used a machine called sequencer , and over the course of a year and a half they succeeded in decoding the DNA. They then presented their results to academic groups. Achieving a world first might sound very wonderful, but the process of decoding the DNA involved very hard work. The students were also responsible for maintaining the equipment, and they had to read difficult research papers and put in extra study beyond their regular schoolwork. "Researchers need to work hard. The work was tiring, but the students worked toward their ambitious goal of achieving a world first. They have a great sense of achievement, and the number of students who hope to become biologists has increased," said Taruma Akinori, who is in charge of the science course. In addition to the results being added to the scientific community, the students' research paper will be translated into English and made available overseas. Moreover, the students have decided to take on a new challenge in DNA decoding. Up to a point, their success is due to _ . A) hi-tech experimental facilities B) the great pressure their school put on them C) the increasing number of biologists D) little interest in their regular school work
**Answer**
A