Read the following article and select the best answer. Article: Have you ever heard that we humans use only ten percent of our brains? This opinion holds a certain appeal because if it were true, then we could instantly become ten times more intelligent just by firing up that sleepy majority of the brain! The idea that we use only a small part of the brain dates back to animal experiments in the 19th century. When scientists stimulated a specific part of the brain, the animal moved its leg or tail. If a tiny part of the brain could do something so great, what was the use of the rest of the brain? Some scientists assumed that large parts of the brain were simply useless. Then, in the early 20th century, scientists observed that stimulating certain parts of the brain had no physical effects. They named these seemingly useless parts of the brain the "silent cortex." Today we know that in humans, much of the "silent cortex" is actually devoted to complex activities like language, learning, and imagining. Brain scans have shown that different parts of the brain become much more active as we shift our attention and focus, but even as we sleep, many areas of the brain are extremely active. Would you be smarter if your entire brain constantly worked to maximum capacity ? Interestingly enough, the opposite is probably true. The less brain activity you need to perform a given task, the more the brain as a whole is able to do. Question: If you need less brain activity to perform a task, _ . - you will feel sleepy - you must shift your focus - you can use your brain to the fullest - you will be more productive
you will be more productive

Read the following article and select the best answer. Article: The USA, New York--Whales and dolphins are facing increasing threats from climate change, according to a new report published by WWF and the Whale and Dolphin Conservation Society (WDCS). The report "Whales in hot water?" draws attention to the growing impacts of climate change on whales.They range from changes in sea temperature and the freshening of the seawater because of the melting of ice and increased rainfalls, to a sea level rise, loss of icy polar habitats and the _ of krill populations in key areas.Krill, a tiny shrimp that is dependent on sea ice, is the main source of food for many of the great whales. The speeding up of climate change adds greatly to trouble from other human activities, such as chemical and noise pollution, which kills some 1000 whales every day. "Whales and dolphins have an ability to adapt to their changing environment," said Mark Simmonds, International Director of Science at WDCS."But the climate is now changing at such a fast pace that it is unclear to what extent whales and dolphins will be able to adjust." Climate change impacts are currently greatest in the Arctic and the Antarctic.According to the report, cetaceans that rely on polar, icy waters for their home and food resources are likely to be greatly affected by the reduction of sea ice cover. WDCS and WWF are urging governments to cut global production of C02 by at least 50 percent by the middle of this century.The latest report of the Intergovernmental Panel on Climate Change showed it was possible to stop global warming if the world's emissions start to decline before 2015. Question: Which of the following is the most important for whales and dolphins? - Rainfall - Krill - Sea ice cover - High sea level
Sea ice cover

(Q).
Read the following article and select the best answer. Article: One August afternoon, Richard Allen dropped off his last passenger, Mrs. Carey. Lifting two grocery bags, he followed her across the yard and stood on the step of her house. Glancing up, he saw a large wasp nest under the roof. Allen had heard that wasps can become more likely to sting(sting, stung, stung)in summer. He mentioned this to Mrs. Carey, who had opened the door. "Oh, they don't bother me," she said lightly. "I go in and out all the time." Anxiously, Allen looked at the nest again-to see the wasps flying straight at him. "Hurry!" he shouted to Mrs. Carey. "Get in!" She stepped quickly inside. Allen ran for his mini-bus. Too late; they were upon him. Just as he jumped aboard, half a dozen red spots showed on his arm, and he felt more on his back and shoulders. As he was driving down the road, Allen felt as if something was burning at the back of his neck, and the "fire" was spreading forward toward his face. An immediate anxiety took hold of him. Allen knew that stings could cause some persons to die. But he had been stung the previous summer and the after-effects soon passed. However, what he didn't know was that the first sting had turned his body into a time bomb waiting for the next to set off an explosion. Miles from the nearest medical assistance, Allen began to feel his tongue thick and heavy and his heartbeat louder. Most frightening, he felt his breathing more and more difficult. He reached for the radio mike ,trying to call the mini-bus center, but his words were hardly understandable. Signals were also poor that far out. He knew a rescue team was on 24-hour duty at the Amherst Fire Department's north station. So his best chance was to make a run for it. Rushing down the mountain, Allen tried not to panic, focusing his mind on each sharp turn. He was almost through the last of them when he felt sure he was going into shock .Just then he reached for the radio mike again. "Call fire station," he shouted, concentrating to form the words. "Emergency. Bee sting. Emergency. There in ten... Question: Which would be the best title for the passage? - A Race Against Death - Wasps, Bloody Killers - Allen, A Helpless Driver - War Against Wasps
(A).
A Race Against Death