Read the following article and select the best answer. Article: Situated in the Northeast region of Vietnam, Halong Bay is made up of 1,969 islands of various sizes, 989 of which have been given names. The concentrated zone of stone islands is famous for its spectacular scenery of caves, and forms the central zone of Halong Bay. Seen from above, Halong Bay looks like a geographic work of art. While exploring the bay, you feel lost in a wonderful world. There is Man's Head Island, which resembles a man standing and looking towards the mainland. Dragon Island looks like a dragon winding above the blue water. La Vong Island resembles an old man fishing. There are also the islands of the Sail, the Pair of Roosters, and the Incense Burner, which are all astonishingly like their names. It has been proven by scientists that Halong Bay was one of the first places of human existence. It is also a region of highly-concentrated biological diversity with many ecosystems of coral reefs, and tropical forests, which are home to thousands of species of animals and rare plants. The beach located along the coast of Halong Bay has a year-round average temperature of 20degC. Among the palm trees are large hotels. Visitors are seen on white sand and under the green trees are small family-run restaurants. After swimming, tourists can enjoy cold drinks. No wonder the 18h meeting of the Committee of the World Heritages of UNESCO officially recognized Halong Bay as a natural heritage site of worldwide importance. Question: What forms the central zone of Halong Bay? - 1,969 islands of various sizes. - The concentrated zone of stone islands. - 989 islands that have been given names. - Man's Head Island.
The concentrated zone of stone islands.

Read the following article and select the best answer. Article: Britain is a popular tourist place. But tours of the country have pros and cons. Good news Free museums. No charge for outstanding collections of art and antiquities. Pop music. Britain is the only country to match the US on this score. Black cabs. London taxi drivers know where they are going even if there are never enough of them at weekends or night. Choice of food. Visitors can find everything from Ethiopian to Swedish restaurants. Bad news Poor service. "It's part of the image of the place. People can dine out on the rudeness they have experienced," says Professor Tony Seaton, of London University's International Tourism Research Center. Poor public transport: Trains and buses are promised to defeat the keenest tourists, although the over-crowded London tube is inexplicably popular Lack of languages. Speaking slowly and clearly may not get many foreign visitors very far, even in the tourist traps . Rain. Still in the number one complaint . No air-conditioning. So that even splendidly hot summers become as unbearable as the downpours. Overpriced hotels. The only European country with a higher rate of tax on hotel rooms is Denmark. Question: Which European county has the highest rate of hotel rooms? - American - Sweden - British - Denmark
Denmark

Q: Read the following article and select the best answer. Article: We know the famous ones--the Thomas Edisons and the Alexander Graham Bells --but what about the less famous inventors? What about the people who invented the traffic light and the windshield wiper ? Shouldn' t we know who they are? Joan Mclean thinks so. In fact, Mclean, a professor of physics at Mountain University in Range, feels so strongly about this matter that she' s developed a course on the topic. In addition to learning "who" invented "what" , however, Mclean also likes her students to learn the answers to the "why" and "how" questions. According to Mclean, "When students learn the answers to these questions, they are better prepared to recognize opportunities for inventing and more motivated to give inventing a try. " Her students agree. One young man with a patent for an unbreakable umbrella is walking proof of McLean's statement. "If I had not heard the story of the windshield wiper' s invention," said Tommy Lee, a senior physics major. "I never would have dreamed of turning my bad experience during a rain storm into something so constructive. " Lee is currently negotiating to sell his patent to an umbrella producer. So, just what is the story behind the windshield wiper? Well, Mary Anderson came up with the idea in 1902 after a visit to New York City. The day was cold and stormy, but Anderson still wanted to see the sights, so she jumped aboard a streetcar. Noticing that the driver was struggling to see through the snow covering the windshield, she found herself wondering why there couldn' t be a built - in device for cleaning the window. Still wondering about this when she returned home to Birmingham, Alabama, Anderson started drafting out solutions. One of her ideas, a lever on the inside of a vehicle that would control an arm on the outside, became the first windshield wiper. Today we benefit from countless inventions and innovations. It' s hard to imagine driving without Garrett A. Morgan' s traffic light. It' s equally impossible to picture a world without Katherine J.... Question: Tommy Lee' s invention of the unbreakable umbrella was _ - not eventually accepted by the umbrella producer - inspired by the story behind the windshield wiper - due to his dream of being caught in a rainstorm - not related to Professor Joan McLean' s lectures
A: inspired by the story behind the windshield wiper

(Question)
Read the following article and select the best answer. Article: What do you hear? Sounds all around you! You can hear the sound of traffic, the wind in the trees, a dog barking, your own breathing and lots of other things. But what is sound? Sound happens when something vibrates or shakes. We can make something vibrate by hitting it. Try this experiment. Put your ruler on your desk so that part of it sticks out over the edge . Put your hand on the part of the ruler that is on the desk. Now pull the part that is sticking out over the edge down, and then let it go. The part you let go will vibrate. It will move up and down very quickly, and give out sound. The part of the ruler sticking out over the edge of the desk produced the sound. If you make that part longer, you will hear a lower sound. When you shorten it, you will hear a higher sound. Why does this happen? When you shorten the ruler, it will vibrate more quickly. When something vibrates more quickly it produces a higher sound. If you _ the ruler, it will vibrate more slowly. When something vibrates more slowly, it produces a lower sound. Question: We can hear a_sound if we make the part of the ruler sticking out over the edge of the desk longer. - higher - lower - strong - nice
(Answer)
lower