Recordings of angry bees are enough to send big, tough African elephants running away, a new study says. Beehives -either recorded or real-may even prevent elephants from damaging farmer's crops. In 2002, scientist Lucy King and her team found that elephants avoid certain trees with bees living in them. Today, Lucy wants to see if African honeybees might discourage elephants from eating crops. But before she asked farmer to go to the trouble of setting up beehives on their farms, she needed to find out if the bees would scare elephants away. Lucy found a wild beehive inside a tree in northern Kenya and set up a recorder. Then she threw a stone into the beehive, which burst into life. Lucy and her assistant hid in their car until the angry bees had calmed down. Next,Lucy searched out elephant families in Samburu National Reserve in northern Kenya and put a speaker in a close to each family. From a distance, Lucy switched on the pre-recorded sound of angry bees while at the same time recording the elephants with a video camera. Half the elephant groups left the area within ten seconds. Out of a total of 17 groups, only one group ignored the sound of the angry bees. Lucy reported that all the young elephants immediately ran to their mothers to hide under them. When Lucy Played the sound of a waterfall instead of the angry bees to many of the same elephant families, the animals were undisturbed. Even after four minutes, most of the groups stayed in one place. Lucy is now studying whether the elephants will continue to avoid the sound of angry bees after hearing it several times. She hasn't tested enough groups yet to know, but her initial results were promising enough to begin trials with farmers. She has now begun placing speakers in the fields to see if elephants are frightened away. Which of the following is true according to the passage? A) Young elephants ignore African honeybees. B) Waterfalls can make elephants stay in one place. C) Elephants do not go near trees with bees living in them. D) Farmers do not allow Lucy to conduct tests in their fields.
C
As the new semester begins,millions of college students across the country are trying hard to remember how best to write a paper-or,more likely,how best to delay that paper. _ is the thief of time and a lot of students suffer from it.They can spend whole days in the library doing nothing but staring into space,eating snacks,surfing the Internet,watching videos and looking at their pretty peers sitting around them,who,most likely,are doing nothing either. Paralyzed by their habit to procrastinate,they write micro blogs about their fears,asking their online friends if they sometimes have the same issue.But this does nothing to solve their problems. According to a recent report by the BBC,95 percent of us procrastinate at some point and 20 percent of the world's population are procrastinators,complicating their lives with their continual delaying of tasks. Procrastinators like to find excuses to justify their behavior,but BBC columnist Rowan Pelling says they are all wrong.Many procrastinators tell themselves they are perfectionists who work best under pressure.Pelling says this is nonsense,as work done at the last minute is more likely to have mistakes than work done on time. She says the behavior of procrastinators often makes them feel flustered and ashamed,inconveniences others,and annoys loved ones. Fortunately,social seientists have made tireless efforts to understand this behavioral shortcoming and offer strategies to control it.Piers Steel,a Canadian social scientist and author of The Procrastination Equation,believes humankind is"designed"to procrastinate.Nevertheless,he suggests a couple of good ways to get through the task at hand. The first one is obvious:Break the task down into small pieces and work your way through them methodically. The second is clever:Give a trusted friend a sum of money and tell them that if you don't complete the task you have undertaken by a specific time,they can keep it or donate it to a cause you hate. What'she best title of the text? A) Who steals my time? B) The solutions to procrastination C) I'll do it tomorrow,I swear! D) Don't do nothing!
C
*Question*
In the hot jungles of Thailand, forest rangers came across a terrible sight one day in 2010. Two tiger cubs lay dead in a wildlife preserve . The rangers were too late to find the cubs' mother. All that remained of her was blood on the ground. Poachers had poisoned the tigers. Then they ran off with the mother's body. If the rangers had not arrived, the poachers would have taken the cubs too. Tigers in trouble One hundred years ago, there were about 100,000 tigers. Today, only about 3,200 remain in the wild. Poachers are a major problem. These killers sell tiger fur, teeth, claws, and other body parts in illegal markets. One tiger's parts can see for $50,000. Because they hunt in huge jungles thick with trees, poachers are hard to find. But they must be caught, says Elizabeth Bennett of the Wildlife Conservation Society. This group works to help endangered animals. Tiger "fingerprints" Finally, after many months, the rangers spotted the poachers again. After an exchange of gunfire, they arrested the criminals. Soon, the police found evidence that the poachers had killed again. The evidence came from a cell phone. On a poacher's phone, police found photos of the men posing with a dead male tiger. The poachers claimed that the photos were from a nearby country where tigers aren't protected. But another photo told a different story. Deep in the Thai forest, the rangers had set up camera traps, which take photos when they sense movement. A camera trap photo showed the same male tiger walking through a wildlife preserve before he was killed. That meant that the tiger came from a protected area. But how could police prove it was the same tiger? Tiger stripes are like fingerprints. No two patterns are the same. When police compared the photos, the stripes on the tiger's head matched. The poachers were given up to five years in prison. That might not seem like much for killing tigers. But since the poachers were caught in July 2011, no tigers have been killed in that wildlife preserve. Why are poachers hard to catch? A) They can run very fast. B) There are not enough rangers. C) The rangers are not professional. D) They hunt in large and thick jungles.
**Answer**
D