Ques:Read the following article and select the best answer. Article: How would you like to sleep with one half your brain asleep and the other half awake? Dolphins sleep this way. Recently, scientists at Indiana State University have discovered that ducks sleep this way too. They found that ducks sleep half awake so they can rest and watch for danger at the same time. After putting their ducks in a row and videotaping them, some researchers found ducks on the end of each row spent more time asleep with one eye open, apparently looking for _ "The more the ducks felt threatened, the more they slept with one eye open," said lead author Niels C. Rattenborg, a graduate student at Indiana State University, Terre Haute. "The unique aspect is not that they do it, but that they control it. When they sleep at the edge of a group, they tend to realize greater danger, so they spend more time sleeping with one half of their brain." Ducks with one eye open were still awake enough to detect predators, said the authors of the study, which appears today in the journal Nature. The researchers studied four groups of four ducks held in plastic boxes, which were arranged in a row. Ducks on the end were found to sleep with one eye open 31.8 per cent of the time, compared to 12.4 percent of the time for ducks in the central position. Also, ducks in the central position did not open one eye more than the others, while ducks on each end kept the eye facing away from the group open 86.2 per cent of the time. Brain wave readings of the ducks showed that the half of the brain receiving signals from the closed eye indicated that half of the brain was sleeping. Signals from the half of the brain receiving signals from the open eye showed a state between fully awake and asleep. Question: Ducks at the end of each row sleep with one eye open because _ . - they are looking for food - they are watching out for danger - they want to enjoy the scenery - they are unique in their sleeping habit

Ans:they are watching out for danger
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Ques:Read the following article and select the best answer. Article: American author Mark Twain once noted that "life would be surely happier if we could only be born at the age of 80 and gradually approach 18." Twain's words were only one of many complaints about aging. The ancient Greek poet Homer called old age "hateful", and William Shakespeare termed it "terrible winter". Alexander the Great, who conquered most of the known world before he died around 323 B.C., may have been looking for a river that healed the of age. During the 12th century A.D., a king called Prester John ruled a land that had a river of gold and a fountain of youth. But the name linked most closely to the search for a fountain of youth is 16th-century Spanish explorer Juan Ponce de Leon. He thought it would be found in Florida. In St. Augustine, the oldest city in the U.S., there's a tourist attraction. It is said to be the fountain of youth that Ponce de Leon discovered soon after he arrived in what is now Florida in 1513. However, elderly visitors who drink the spring's water don't turn into teenagers. But the tale of the search for a fountain of youth is so appealing that it survives anyway, says Ryan K. Smith, a professor of history. "People are more attracted by the story of looking and not finding than they are by the idea that the fountain might be out there somewhere." Still, a few grains of truth have helped to support . Kathleen Deagan, a professor of archaeology, says a graveyard and the remains of a Spanish mission dating back to St. Augustine's founding in 1565 have been discovered near the so-called fountain of youth. Michelle Reyna, a spokesperson for the Fountain of Youth Archaeological Park in St. Augustine, says the fountain has been a tourist attraction since at least 1901 and may have been attracting visitors since 1860. Question: According to the passage, who searched for a fountain of youth _ ? - Ponce de Leon - William Shakespeare. - Kathleen Deagan - Michelle Reyna

Ans:Ponce de Leon
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Ques:Read the following article and select the best answer. Article: While there are many fascinating countries in the world to visit, I think there is something more adventurous, exotic and romantic about visiting an island country. Take a look at some breathtakingly beautiful island countries in the world, which everyone should certainly visit at least once in his lifetime. Malta Malta is a beautiful southern European country in the Mediterranean Sea, which has a rich history and culture. There are amazing sky-high cliffs to climb, splendid temples to explore and lots of wonderful places to go scuba-diving. In fact, there are plenty of interesting things to see and to do in Malta and this island country has something for everyone. The historic part of Malta is shown in its incredible architecture, great walled cities, and many underground tunnels. Fiji Fiji is a fabulous island that has plenty of surprises for any adventurous travelers. It is famous for the world's best surf scenes, and many surfing enthusiasts travel to Fuji yearly to ride the great waves. Well, if surfing is not for you and you love sitting on the beach and relaxing, hiking or seeing breathtaking waterfalls, Fiji is certainly the best island country to visit. Maldives Not only is Maldives one of the most beautiful island countries, but it is one of the most popular honeymoon destinations. Situated in the middle of the Indian Ocean, Maldives is made up of a series of ancient coral reefs that grow up along the sides of ancient volcanoes, with fascinating beaches and luxurious resorts. Question: If a newly-married couple are looking for the best honeymoon destination, they will choose _ . - Malta - Fiji - the Mediterranean Sea - Maldives

Ans:Maldives
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Ques:Read the following article and select the best answer. Article: Do you know mulch? Mulch is a protective cover of material that is spread on top of soil. It is usually made out of organic material, like crop waste. Farmers may keep the remains of corn or other crops on top of the soil. This creates mulch on the soil surface. The plant remains help protect the soil against wind and water damage. Mulching is one of the best things people can do for their plants. It also helps keep the soil from getting dry, and reduces the need for watering plants. It also limits temperature changes in the soil. And it stops unwanted plants, or weeds, from growing. Organic mulch improves the condition of soil. As the mulch breaks down, it provides material which keeps the soil from getting hard. This improves the growth of roots and increases the movement of water through the soil. It also improves the ability of the soil to hold water. Organic mulch contains nutrients for plants. It also provides good environment for earthworms and other helpful living things in the soil. It is easy to find organic mulch materials. Cut-up leaves and small pieces of tree bark can be used. Grass cuttings are also a good mulch for plants. Mulch from news- papers works well in controlling weeds. The best time to add mulch depends on your goal. Mulch provides a thick barrier between the soil and the air. This helps to reduce temperature changes in the soil. As a result, mulched soil will be cooler than other soil in the summer. In winter, the mulched soil may not freeze as deeply as other soil. The best time is after the ground has frozen, but before the coldest weather arrives. Spreading mulch before the ground has frozen may attract small animals searching for a warm place to spend the winter. Delaying the spreading should prevent this problem. The animals will probably find another place to live. Question: The following can be used as organic materials to make mulch EXCEPT _ . - tree barks - plastic - grass cuttings - cut-up leaves

Ans:
plastic
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