Read the following article and select the best answer. Article: Which animal has the fastest snapping jaw ? If you're guessing a shark or perhaps a larger animal, you'll have to think smaller. The trapjaw ant, which lives in Central and South America, moves its mouth parts at 35 to 63 meters per second. Another way to think about this is that the ant's jaws close at 125 to 233 kilometers per hour. That's 2, 300 times faster than the blink of an eye. Scientists were able to measure the amazing jaw speed using highspeed video techniques. Sheila Patek, a biologist, says the key is that the jaws have a springy system, which is critical in getting explosive speeds. Consider a bow and arrow. If you try to throw an arrow with your arm, it won't go very far. If you use a bow, elastic energy stored in the bow is released almost instantly when you release the arrow with your finger or a latch. The combination of the springy bow and latch mechanism is what makes the arrow zoom through the air. Maybe even more amazing than how fast these ants grab food or even enemies is how they use this same energy to move. As the ant closes its jaws, it uses them to push off the ground--all faster than the eye can see without slow motion video. A snap of the jaw can send an ant up to 8.3 centimeters into the air. That's like someone who is 1.7 meters jumping 13 meters high! Not only can they quickly escape from enemies, but often a group of ants will start jumping all at once. It would be hard for their enemies to grab just one. People have suspected the ants used their jaws to jump for over a century, but could only prove it with today's modern video equipment. Question: According to the passage, the trapjaw ants' jaws keep them safe because _ . - they can catch their enemies easily with their jaws - their jaws make them difficult to recognize - their jaws help them find food easily - their jaws help them escape from their enemies
their jaws help them escape from their enemies

Read the following article and select the best answer. Article: Since American students have been introduced into the era of the Massive Open Online Course, the opportunity for cheating appears greater than ever. The all-knowing Google search engine is within easy reach. So how can a teacher handle such a large number of examinees so far away, let alone searching out cheaters taking tests across the Internet? Using technology, of course. While special services via webcam and cheating detecting software have been developed now, Mettl, an online company, has developed advanced techniques for netting cheaters, which the company claims are even more reliable and easier to use. Whatever small attempt to cheat, he or she will be found out. Mettl has adopted a mass of technologies on its test-taking platform, creating a mini monitoring state in an exam. Here's how it works: A test-taker signs on to Mettl and selects his/her exam from the site's library of pre-loaded tests. Facial and keystroke recognition technology confirm the person that has signed in is the very person, and the system records both the test-taker (through the webcam) and the test-taker's screen throughout the test. Mettl's technology uses the test-taker's webcam to detect how many people are using the computer. Soon, it will track eye movement well enough to sense whether the test-taker is looking away from the screen, perhaps to consult a smart phone or a friend in secret. Mettl also monitors the test-taker's screen and can detect when the test-taker has changed a computer or moved from the test. The system will soon be able to record sound, detecting whether the test-taker is talking or being talked to. If any wrongdoings are detected, the system flags the incident and reports it back to the test's administrator. This can bring any number of things, depending on the test-giver's wishes: a complete shutdown of the exam, a warning message that appears on the test-taker's screen, even human instructions from the control center. Mettl is hoping its technology will help it break into the country's big MOOC markets. Question: Which part of a newspaper does the article come from? - Health - Entertainment - Education - Culture
Education

Read the following article and select the best answer. Article: It was a very foggy day in London. The fog was so thick that it was impossible to see more than a foot or so. Buses, cars and taxis were not able to run and were standing by the side of the road. People were trying to find their way about on foot but were losing their way in the fog. Mr. Smith had a very important meeting at the House of Commons and had to get there but no one could take him. He tried to walk there but found he was quite lost. Suddenly he bumped into a stranger. The stranger asked if he could help him. Mr. Smith said he wanted to get to the Houses of Parliament. The stranger told him he would take him there. Mr. Smith thanked him and they started to walk there. The fog was getting thicker every minute but the stranger had no difficulty in finding the way. He went along one street, turned down another, crossed a square and at last after about half an hour's walk they arrived at the Houses of Parliament. Mr. Smith couldn't understand how the stranger found his way. "It is wonderful," he said. "How do you find the way in the fog?" "It is no trouble at all to me," said the stranger, "I am blind." Question: Which of the following statements are NOT true? - The stranger has a better sight than Mr. Smith. - Heavy fog can cause traffic accidents. - It's easy to get lost in a foggy day. - The fog was getting thicker and thicker.
The stranger has a better sight than Mr. Smith.

Read the following article and select the best answer. Article: Today's word, pan, takes us back to the days of the gold rush in California. On January 24th, 1848, a man named James Wilson Marshall discovered gold in California. The news spread quickly. Thousands rushed west. They traveled on foot, on horseback and by boat to reach the gold fields. By 1849, the great gold rush was on. Towns and cities grew overnight. Throughout California --- in the mountains, along the streams and rivers --- thousands of people searched for gold. Some found areas of mountain rock thick with gold. These men got rich. But such areas were few and quickly claimed by the first men to find them. Others searched for gold in the rivers coming down the mountains. They were after pieces of gold that the rains had washed down from above . The only way to find this gold was by panning. First a gold miner put dirt in a metal pan and added water. Then he shook the pan so that the water would wash the dirt. Slowly, he poured the water out of the pan. If he was a lucky miner, pieces of gold would remain. Across the nation, newspapers carried stories of the gold being found. Each one hoped that the place he claimed panned out well --- had some gold. For many, gold mining did not pan out. For a few, it panned out well. But in time, huge machines were built that could wash many tons of dirt at a time. Panning died out. The word, however, remained in the language. Today, Americans still say, " It panned out well ," when something they have done pleases them. A business, a discovery, a simple event pans out well if it is successful. Unhappily, sometimes things do not pan out. In recent years, the word pan has taken on another meaning. Today, it also means to criticize. How it got this meaning is hard to discover. But the job of a critic is to sometimes pan the work of a writer, artist or singer. Question: Why did so many people flood to California in 1848? - Because towns and cities there developed quickly. - Because the mountains in California were a great place for travel. - Because they wanted to get rich by looking for gold. - Because the land of California was fertile at that time.
Because they wanted to get rich by looking for gold.