*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: There are hundreds of national parks and wildlife areas in Africa that you can travel to. Here are the top four travel destinations in Africa: Tanzania----Serengeti National Park During the annual migration , when the wildebeests and zebras pack up and leave their living areas to find fresher ones, the Serengeti is an astonishing place to be. It's a very good travel spot in Africa at other times of the year too, but the migration has been ranked by many as one of the wonders of the natural world. Kenya----Masai Mara National Park If you want to see the big cats, this wildlife park is the best of the best. Lion, leopard and cheetah abound and they are relatively easy to spot because of the grassland vegetation which means you get good views for miles around. Another big plus is the fact that going off road is allowed and it is a big advantage because the animals will rarely oblige you and stay next to the major roads. South Africa-Kruger National Park For the variety of species no other places in Africa can come close to the Kruger Park. And because it is so large it has a number of different ecosystems that you can pass through in your search for animals and birds. It is one of the best managed parks in Africa and the accommodation is well-equipped, too. Zambia-South Luangwa National Park South Luangwa is a diamond in the rough, just waiting for enough exposure to bring it to its rightful place in the crown of prime Africa trips. It has been regarded as one of the best places in Africa to see the special leopard and it is the birthplace of the walking travel. Question: In which parks can visitors see leopards? Options: A: Serengeti National Park and Krunger National Park. B: Masai Mara National Park and South Luangwa National Park. C: Krunger National Park and South Luangwa National Park. D: Serengeti National Park and South Luangwa National Park.
**Answer**
B

*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: Ears are for hearing -- everyone knows that. But for a creature called the Cuvier's beaked whale, hearing starts in the throat, a new study found. The observation might help explain how all whales hear. The work might also help scientists understand how animals are affected by underwater sonar . This sonar, used by some ships, sends out sound waves to locate underwater objects. The Cuvier's beaked whale is a so-called toothed whale. Toothed whales dive deep into the ocean in search of food. As the whales hunt, they produce sounds that reach objects and then return to the whales. This allows the animals to "see" the shape, size, and location of objects, even when they're 1,000 meters under the sea, where it is totally dark. To better understand how the whale hears, researchers from San Diego State University in California took X-rays of two Cuvier's beaked whales. The whales had died and washed up on the beach. Ted Cranford and his colleagues used the images to make a computer model of a Cuvier's beaked whale's head. Then, they modeled the process of sound traveling through the head. The researchers knew that some sounds get to the ears of a toothed whale through a structure called "the window for sound". Found on the lower jaw, this structure is very thin on the outside and has a large pad of fat on the inside. When the researchers used their computer model to work out how sound waves travel in the whale's head, they were surprised to find that sounds coming from right in front of the whale actually travel under the animal's jaw. From there, sound waves move through the throat, into a hole in the back of the jaw, and finally to the pad of fat near the animal's ears. Cranford guesses that other types of whales may hear through their throats. Further testing is needed to be sure. Eventually, the insight into how whales hear might explain whether sonar testing by military ships is causing the animals to wind up on beaches. Question: Which of the following describes the way taken by sound waves through a Cuvier's beaked whale? Options: A: A hole in the back of the jaw - the ears - the jaw - the throat. B: The jaw - the throat - a hole in the back of the jaw - the ears. C: The throat - the jaw - the ears - a hole in the back of the jaw. D: The ears - the throat - a hole in the back of the jaw - the jaw.
**Answer**
B

*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: In South America, the rich soil of the Amazon River basin in Brazil is known as "black gold". Scientists found that the secret of this rich soil was charcoal . Local people made it from animal bones and tree branches. They mixed the charcoal with the soil about 1.500 years ago. Now, scientists in the United States have done a modern demonstration. They say charcoal fertilization offers a revolutionary way to improve soil quality for hundreds or even thousands of years. Mingxin Guo and his team at Delavare State University heated tree leaves, corn stalks , small pieces of wood and poultry waste into "biochar" . They reported their findings at a recent meeting of the American Chemical Society in New Orleans. Biochar could be good news for farmers with poor soil and hungry populations to feed. Professor Guo says it could even help against global warming. Intensive farming and overuse of chemical fertilizer give out carbon dioxide into the atmosphere. Biochar does the opposite, he says. It traps carbon in the ground. The researchers planted winter wheat in containers of soil in a greenhouse -- some with biochar, some without. Professor Guo says the wheat grows much better in the pots with biochar. The soil was added two percent charcoal to. But he says even a one percent treatment will increase productivity. The results demonstrated that biochar can increase organic matter in soil. Loss of nutrients in soil is an increasing problem worldwide as farmers try to grow more food for growing populations. Next, the team will carry out a five-year study of biochar with spinach , green peppers and tomatoes. Mingxin Guo says he learns about the "black gold" in Brazil from a magazine story. He explains that it was discovered in the jungle, in the area where waters flow to the Amazon, in the 1960's. But it was not until recent years that scientists began to bring public attention to it. Question: Biochar has the following advantages EXCEPT that _ . Options: A: it can improve the condition of the soil B: it can be used as a kind of energy C: it can help against global warming D: it can increase productivity of the corn
**Answer**
B