Read the article and select the best answer. Article: Motorists who used to listen to the radio or their favorite tunes on CDs may have a new way to entertain themselves, after engineers in Japan developed a musical road surface. A team from the Hokkaido Industrial Research Institute has built a number of"melody roads,"which use cars as tuning forks to play music as they travel. The concept works by using grooves .They are cut at very specific intervals in the road surface. The melody road uses the spaces between to create different notes. Depending on how far apart the grooves are, a car moving over them will produce a series of high or low notes, and designers are able to create a distinct tune. Paten documents for the design describe it as notches "formed in a road surface so as to play a melody without producing simple sound or rhythm and reproduce melody-like tones". There are three musical strips in central and northern Japan--one of which plays the tune of a Japanese pop song. Reports say the system was invented by Shizuo Shinoda. He scraped some markings into a road with a bulldozer before driving over them and found that they helped to produce all kinds of tones. The _ speed for melody road is 44kph,but people say it is not always easy to get the intended sound. "You need to keep the car windows closed to hear well,"wrote one Japanese blogger."Driving too fast will sound like playing fast forward, while driving around 12mph[20km/h]has a slow-motion effect, making you almost car-sick." Question: In order to hear the music well, you have to _ . Options: A: drive very fast B: drive slowly C: open the windows wide D: keep the windows closed
D

Read the article and select the best answer. Article: First Man-Bear-Pig, and now global warming; it seems Al Gore never stops to surprise the world. Recently Al Gore produced the movie An Inconvenient Truthwhich explained the threats and told us how to control global warming. What it left out is that there is no proof that human activity is even causing global warming, let alone if global warming is even taking place. Global warming is the idea that greenhouse gases that shut in infra-red radiation in the earth' s atmosphere are becoming more powerful and heating our planet up. The theory is that if the planet continues to heat up the polar ice caps could melt and cover the earth in water. Over the last 100 years the Earth has increased one degree in temperature, and sea level has risen millimeters. Even though this "eye-opening" news is taking place, there is no clear proof saying that it is due to global warming. It could be just a regular weather pattern the earth is circulating. The polar ice caps have not grown or reduced in size since man began tracking them. Also the ground-based temperature has remained the same besides growing cities. In fact most clues support the idea that global warming is not taking place and human activity isn't causing any earth to melt down. Although Al Gore insists the world is on its way to certain destruction, the facts say otherwise. It seems that driving to work won' t lead to the doom ( ) of mankind, and the movie Water World won' t be happening any time soon. Question: Global warming is the idea generally about _ . Options: A: greenhouses B: infrared radiation C: greenhouse gases D: the atmosphere
C

Read the article and select the best answer. Article: An African proverb says that a single hand cannot tie a bundle. Everyone needs companions to help them sail through the rough seas of life. Even the strongest and richest person still needs friends. Our money and strength would have no value if we had no friends to share with us. The best friendship is a give-and-take relationship. We need the support of our family, friends and the community. In turn we also give support to the society, our friends and our family. The word "friend" has many meanings. It could be the bus driver who takes you to and from work every day. It could be a parent, a colleague, a wife or husband, a brother or sister, or even the unknown person who helped you just once when you could not find your way. Real friends share not only our happiness but our sorrows as well. This may explain why we have the expression "a friend in need is a friend indeed". Friendship is like the sunshine that keeps us warm. It is like the refreshing raindrops on the fields that give the farmers hope of a good planting season. Without friends our life would be like a desert where our only friend would be loneliness and sadness. The most fortunate person is the one who has friends from all levels in the society. A driver might find friends not only among his colleagues but among farmers, bankers, traders, students, politicians or teachers. We should never forget our old friends when we make new ones. We should treasure each of our friends whether poor or rich, beautiful or not. Each friend is _ in his or her own way. And all together, they enrich life and make it very colourful. Question: What is the main topic of the passage? Options: A: How to sail through the sea of life. B: Friends and friendship. C: A friend in need is a friend indeed. D: Never forget old friends when making new ones.
B

Read the article and select the best answer. Article: Imagine having an idea, drawing it on paper, bringing it to a store and seeing it turned into a physical object.This is now possible with the help of 3D printers.Such machines were once used just by universities and big companies.But now, stores with 3D printing services are appearing around the United States. Bryan Jaycox and his wife opened The Build Shop LLC in Los Angeles two years ago.The store is filled with tools like a laser cutter, an industrial sewing machine and 3D printers.Bryan Jaycox requires $ 15 an hour to print an object.He also charges a fee depending on the size of the object and up to $ 50 an hour for design and labor services. The Jaycoxs also offer 3D printing classes for anyone who is interested.One of the students in a recent class was Ki Chong Tran.He plans to open a 3D printing business in Cambodia."The demand has been amazing.It's been much more than I would have imagined," said Ki Chong Tran. "I think 3D printing is going to be huge. It's going to make a huge impact on society as a whole," he added. Mr Jaycox predicts that within five years, 3D printing technology could become more consumer friendly. But Ki Chong Tran says even current technology can make a difference in a developing country like Cambodia."With 3D printing you can give them tools, and you put it in their hands so they are responsible more for their own development. They learn skills beyond just learning English and becoming a tour guide or something like that or working at a bank.You can actually create things that give value to the world," said Ki Chong Tran. He says it's not just Cambodia but anywhere where there is a 3D printer, it can turn a good idea into reality. Question: Bryan Jaycox opened The Build Shop LLC to _ . Options: A: sell 3D printers and different kinds of tools B: produce all types of printing machines C: offer 3D printing classes and services D: design different types of 3D printers
C