Read the article and select the best answer. Article: More than 200 scientists have completed a twoyear study to identify the most natural and undeveloped areas on Earth. Their findings are reported in a new book called Wilderness:Earth's Last Wild Places. The book describes 37 wilderness areas around the world. Each has an area greater than 10,000 square kilometers. The study considered only areas where at least 70% of all plants are native. North and South America are home to the largest number of wilderness areas. There are 16 such areas, from southern Argentina to Alaska and northern Canada. Africa has 8 wilderness areas, including the thick forests and the grasslands. Australia and New Guinea share 6 areas. Europe has 3 areas and Asia has 2.The Arabian Desert and Antarctica also are considered wilderness areas. The largest wilderness area is the Boreal Forest .It extends for 16million square kilometers south of the Arctic Circle. The Boreal Forest extends across Alaska, Canada, northern Europe and Russia. The smallest of the 37 wilderness areas is the Sundarbans. It is the world's largest tidal mangrove forest .It covers 10,000 square kilometers of land at the mouth of the Ganges River in India and Bangladesh . The study found that wilderness areas cover about 46% of the Earth's land surface. However, they are home to less than 2.5% of the world's population. Nineteen of the wilderness areas have only about one person for each square kilometer. Native people usually live in these areas. Wilderness areas help to influence the world's weather systems and rainfall. They are also home to many plants and animals. Population growth and the spread of agriculture and mining operations threaten wilderness areas. But just 7% of all such areas have some form of official protection. Question: What does the author think of the wilderness areas around the world in the book? Options: A: Unwanted. B: Long-lasting. C: Valuable D: Perfect.
C

Read the article and select the best answer. Article: The World's Largest Insect .This giant insect can be used as a toy. A child ties one end of a string to a stick and the other end around the "neck" of an insect. Holding the stick, the child lets the insect go. With a loud whirring sound, the insect takes off, pulling the string in a large curve over the child's head. The child laughs as the stick jumps around. The child is African, and the toy is the African Goliath beetle, the largest insect in the world. The Goliath is a true insect because it has six legs and a body that is divided into three parts. Like all beetles, it has two pairs of wings. The front pair are thick and stiff and protect the back pair, which are soft. It is these soft back wings that make the beetle fly forward. They also cause the loud whirring sound the beetle makes when it flies. To steer, the beetle twists and turns its legs the same way you steer a bike by turning its front wheel. African children often use the Goliath beetle as a toy. Although it is over 15 centimeters long, it is quite harmless. Question: What do African children often use the Goliath beetle as? Options: A: a tool. B: a toy. C: harmfull insects. D: Good animals.
B

Read the article and select the best answer. Article: They say that the real marathon begins at 35 kilometers -- the rest is just a warm up. And sure enough, in 2009, at around the 36 kilometer point of the Beijing Marathon I experienced what runners call "hitting the wall". I had been doing well until that point, but suddenly I felt a sharp pain in my leg. My pace slowed down dramatically and every brain cell in my head seemed to be screaming "stop!!!" The last 5 kilometers were not fun; in fact, they were really hard work. Keeping motivated to run those last few kilometers was one of the hardest things I had ever done. But that is what makes running a marathon such a rewarding experience -- if it were easy everyone would do it. I have to admit it is sometimes not even easy to find the motivation to get out of bed, pull on your running shoes and head out into the morning to go for another run. These last two weeks of training for the Muztagata climb have been a little tough. I have been following my training plan for about three months but now I find that my original enthusiasm has all been used up. Day after day of going to the gym is beginning to wear me down and there still seems so much longer to keep this up. I have begun to doubt that I am actually making any progress or getting any fitter and even thought that I might be going backwards! These are all very common experiences for people who are working towards challenging, longer term goals and I have learned to recognize these "highs" and "lows" in my energy and enthusiasm. Over the years I have learned a number of tricks that help me to deal with the days when my early motivation seems to have abandoned me for good. Question: What is the author going to talk about in the following passage? Options: A: How to get trained. B: Tips for becoming a marathon runner. C: How to meet challenges. D: Tips for keeping motivation high.
D