Read the article and select the best answer. Article: Many people say dolphins are very intelligent. They seem to be able think, understand, and learn things quickly. But they are smart like humans or more like cats or dogs? Dolphins use their brains differently from people. But scientists say dolphin intelligence and human intelligence are alike in some ways. How? FACT 1: Talk to Me Like humans, every dolphin has its own "name". The name is a special whistle . Each dolphin chooses a specific whistle for itself, usually by its first birthday. Actually, scientists think dolphins, like people, "talk" to each other about a lot of things, such as their age, their feelings, or finding food. And, like humans dolphins use a system of sounds and body language to communicate. But understanding their conversations is not easy for humans. No one "speaks dolphin" yet, but some scientists are trying to learn. FACT 2: Let's Play Dolphins are also social animals. They live in groups called pods, and they often join others from different pods to play games and have fun ---just like people. In fact, playing together is something only intelligent animals do. FACT 3: Fishermen's Helpers Dolphins and humans are similar in another way: both make plans to get something they want. In the sea of southern Brazil, for example, dolphins use a interesting strategy to get food. When fish are near a boat, dolphins signal to the fishermen to put their nets in the water. Using this method, the men can catch a lot of fish. What is the advantage for the dolphins? Why do they assist the men? The dolphins get to eat some of the fish. Question: What can we learn about dolphins according to the text? Options: A: A dolphin gets its food from its mother. B: Dolphins communicate a lot with one another. C: Dolphin conversations are easy to understand for men. D: Dolphins communicate by whistling instead of using body language.
B

Read the article and select the best answer. Article: Starting next month, people in prefix = st1 /Washingtonwill be able to rent a bicycle day and night with a membership card. A new company called SmartBike will make 120 bicycles available at 10 spots in the city. "There's a lot of stress on our transit systems," said Jim Sebastian, who manages bicycle and pedestrian programs forWashington's Transportation Department. Offering another choice, Mr Sebastian said, "It will help us reduce traffic jam and pollution, as well as parking problems." In the deal, the company will have the advertising rights in the city's bus shelters and it has reached a similar deal with San Erancisco. Chicago andPortland,Ore., are also considering the program. For a $40 annual membership fee, SmartBike users can check out three-speed bicycles for three hours at a time. The program will not provide helmets but does encourage their use. Similar programs have proved successful in Europe. The Ve1ib program in Paris and Bicing in Barcelona, Spain, both started around a year ago and already offer thousands of bicycles. Mr Sebastian, who started trying to bring bike-sharing to Washington even before its success in Paris and Barcelona, said he believed that the program could grow within a year and hoped that it would eventually offer 1 000 bicycles. "But studies showed that many bikes would get stolen in a day, or within a few weeks," said Paul DeMaio, a Washington-area bike-sharing consultant. Improved technology allows programs to better protect bicycles. In Washington, SmartBike users who keep bicycles longer than the three-hour maximum will receive demerits and could eventually lose renting privileges. Bicycles gone for more than 48 hours will be considered lost, with the last user charged a $200 replacement fee. The low cost could be one of the program's major selling points. At GeorgeWashingtonUniversityin Foggy Bottom, one of the program's 10 locations, students were unsure how often they would use SmartBike, but said its price made it worth a try. Question: The program can help the city in the following ways EXCEPT _ . Options: A: protecting the environment B: reducing the traffic jam C: giving more traveling choices D: making more money
D

Read the article and select the best answer. Article: The United States of America is the most culturally diverse country in the world in terms of culture religion, ethnicity and sexual orientation. As a combination of various races and cultures, America is home to all. The culture here is so unique that citizens can be just as proud of their original cultural heritage as they are to be American. What is now the US was initially inhabited by native people until the land was settled by various European groups and African slaves. Since the 20th century, the country has become a heaven for people from all over the globe . The arrival of immigrants has shifted populations from rural areas into cities because immigrants tend to settle in urban areas. At present, 81 percent of the inhabitants in the US live in cities. Cultural and ethnic diversity adds a unique flavor to cities that is expressed through distinct neighborhoods, restaurants, places of worship, museums, nightlife and multicultural learning environments. Unique musical forms, such as jazz, rock and roll, Chicano music, and the blues, grow in the US by mixing a variety of culturally distinct musical traditions to create a new form. At the executive level, the country is headed by a mixedrace president; two posts on the Supreme Court are held by members of the country's two largest minorities.There is also diversity in state and local governments. Without its rich mixture of races and cultures, America would not be the nation that it is today. Founded upon the basis of equality and freedom, America acts as a stage where different cultures not only coexist peacefully, but develop well. Question: Where did most people live before many immigrants came to America? Options: A: In the urban areas. B: In the rural areas. C: In the southern part of America. D: In the northern part of America.
B

Read the article and select the best answer. Article: We often use an Internet search engine to find a website that will provide information. For example, if we want to learn something about the Pepsi Cola Company, its website provides information about the history of the company. We can also find articles in newspapers and magazines. We confirm information with second and third sources to make sure the information is correct. Sometimes we also use an encyclopedia --- a set of books containing information on almost any subject. Encyclopedias are written by experts and have been a trust --- worthy source of information for years. Now there is also a free online encyclopedia called Wikipedia, which is written by people around the world. Anyone can edit or add to an article, but this has caused problems. Last year, a former editor of the paper USA Today discovered wrong information about him on Wikipedia. Someone had written an article that falsely linked him to a political assassination . This wrong information was quickly corrected. According to a recent study by the publication Nature, Wikipedia has more mistakes, compared with Britannica --- a well-known printed encyclopedia. It found an average of four mistakes in a Wikipedia article, and three in an article of Britannica's. But Wikipedia supporters note that they are able to correct information when they find a mistake while written publications are not able to do this. Wikipedia started in 2001. The word "wiki" comes from "wiki wiki", which means "quickly" in the Hawaiian language. It is said that it is the largest single source of information in history. It is also one of the fastest growing sites on the Internet. It offers more than three million articles in more than two hundred languages. Each month, it records more than two billion page visits. Jimmy Wales, who helped start Wikipedia, says that its purpose is to provide everyone with a free encyclopedia written in their native language. You can find information on nearly every subject on Wikipedia. However, some experts warn people not to believe... Question: From the passage, it can be inferred that _ . Options: A: printed encyclopedia will lose their popularity. B: it is necessary to confirm information on Wikipedia. C: information on Wikipedia is available in any language. D: more and more mistakes will be found on Wikipedia.
B