Q: Read the following article and select the best answer. Article: Living in the wild can be hard. Finding food and staying safe aren't easy. Each day, animals struggle to survive in their habitats. Not all animals get by on their own. Some animals form a close partnership with other kinds of animals. These pairings are called symbiotic relationships. In a symbiotic relationship, the animals depend on each other. One animal helps the other meet its needs. Sounds good, right? Not always. Some animals are not very kind to their partners. In some cases, one animal meets its needs but hurts its partner. Take ticks, for example. These insects suck blood to live. To get blood, they attach themselves to other kinds of animals. Ticks can pass germs that cause disease instead of helping their hosts. In other relationships, animals don't treat their partners so poorly. Both animals benefit from living with the other animal. Small animals called cleaner shrimps have found a way of helping fish at coral reefs. As their name suggests, the shrimps clean the fish. They hang out at what scientists call a cleaning station. A fish stops by. Then a shrimp climbs onto the fish and even steps into the fish's mouth. The shrimp uses its tiny claws to pick stuff off the fish's body. That can include dead skin, tiny pieces of food, and wee creatures that can hurt the fish. The fish gets a nice cleaning. The shrimp enjoys a tasty meal of fish trash. Small birds called plovers are also in the cleaning business. They have big customers-crocodiles. Crocs have long snouts filled with sharp teeth. Cleaning them is tricky. When a croc opens its mouth, the plover hops right in. The croc does not snap its snout shut.Instead, it lets the plover eat small, harmful animals attached to the crocodile's teeth. The plover gets an easy meal while the croc gets clean teeth. Question: When plovers hop into crocodiles' mouths, they _ . - are really to clean crocodiles' teeth - are to make crocodiles happy - aren't afraid of being eaten - aren't happy to clean the crocodiles' teeth
A: aren't afraid of being eaten

Q: Read the following article and select the best answer. Article: KATHMANDU, Nepal (CNN) - Nepal has given its security personnel permission to shoot pro-Tibet demonstrators during China's Olympic flame climb to Mount Everest's summit early next month. "About 25 soldiers and policemen have established camps on the mountain and they have been ordered to use force if necessary to stop any anti-Chinese activities," Mod Raj Dotel, spokesman for the home ministry, said Sunday. "This could mean shooting if necessary." Security personnel will also check mountain climbers for non-essential expedition materials, Dotel added. "If anyone is found with anti-Chinese material their permit will be canceled and returned from the mountain," he said. Chinese climbers plan to take the Olympic flame to the top of the world's highest peak, at 8,848 meters (29,028 feet) as part of the global relay leading up to the August 8 opening of the Summer Olympics in Beijing. Spring is the most popular season for climbing Mount Everest, which straddles the border between Nepal and Tibet, an autonomous region of China. The Nepali government has given permits to dozens of climbers from 30 expeditions this season. But between May 1 and May 10, climbers are _ from going above 6,400 meters until the torch run is completed. China plans to take the Olympic flame to the summit sometime then. Bad weather conditions allow only about two opportunities in May for a push to the summit. The Chinese have not allowed any expedition to climb the mountain from the north side, according the Kathmandu representative of the Tibet China Mountaineering Association. Almost every day in the past month, Nepalese police have arrested pro-Tibet protesters from in front of the Chinese Embassy and the United Nations offices. The demonstrators are released later in the evening. Supporters of Tibet punish the government's attitude toward the autonomous region, and many believe China should not have been awarded the honor of hosting the Olympic Games. Earlier torch relay stops in London, England; Paris, France; and San Francisco,... Question: How many times Climbers can reach the top of the mountain at most in May? - once - twice - three times - as many times as they can
A: twice

Q: Read the following article and select the best answer. Article: Have you ever imagined what the world will be in the near future? A recent study shows that the world in 2100 will be more crowded, more polluted and less stable ecologically than the world we live in now. Visible ahead is serious stress involving population, resource and environment. Despite greater food output, people in the world will be poorer in many ways than they are today. For hundred of millions of the extremely poor, the outlook for food and other necessities of life will be no better, for many it will be worse. While the economies of the developing countries are expected to grow at a faster rate than those of the industrialized nation, the total national product per head in most less developed countries remains low. The existing gap between the rich and poor nations will further widen. World food production is estimated to increase by 90 percent from 2000 to 2100. Most of that increase goes to the countries that already have higher per-head food consumption. Meanwhile, per-head consumption of food in the developing countries will scarcely improve or will actually fall far below the present inadequate level. What is worse is that prices for food are expected to double. As a result, many less developed countries will have increasing difficulties meeting energy needs. For the one quarter of mankind that depends primarily on wood for fuel, the outlook is not hopeful. Regional water shortage will become more sever. In the 1970-2100 period population growth will require twice as much water as it does today in nearly half the world. Still greater increases would be needed to improve standards of living. Development of new water supply will become more costly. Question: According to the passage, in 2100 while output of food will be greater, _ . - people will have sufficient food supplies - the resource will become more than enough - in most developing countries people will have less food than they have today - the living standard of the world's population will improve greatly
A: in most developing countries people will have less food than they have today