Read the article and select the best answer. Article: More than 40 countries, including Russia and Taiwan, have agreed to be founding members of China's proposed Asian Infrastructure Investment Bank. However, two of the world's largest economies, the United States and Japan, have _ at this time. China proposed the bank last October as a way to finance roads, bridges, ports and other needed infrastructureprojects in Asia. The time limit for joining as a founding member was March 31. In only a few months, the number of countries seeking membership nearly doubled. They came from Africa, Europe, South America, Asia and the Pacific. Some European powers added themselves to the list. They include Britain, Germany, France and Italy. Other important economies include South Korea, Australia and Russia. Taiwan also sought to become a founding member. But it is not clear how China will react. Taiwan and China do not have diplomatic ties. But, relations have improved since the election of President Ma Ying-jeou in 2008. The two sides also are working on details of a trade agreement. However, popular opposition in Taiwan to mainland China's increased influenceon the island remains very strong. The U.S. and Japan have said they are concerned about the governance of the Asian Infrastructure Investment Bank, or AIIB. The United States has urged countries to consider details about the bank's governance and standards -- itssocialand environmental policy -- before joining. Critics say the AIIB threatens the work of existing development banks such as the World Bank, the International Monetary Fund and the Asian Development Bank. Yet, the Asian Development Bank itself noted in a recent report that the need for infrastructure projects in Asia is great. The institution, led by the U.S. and Japan, estimated last May that the Asia Pacific area needed $800 billion each year in infrastructure development. Experts are watching to see how China will take its leadership role in the new bank. The AIIB is expected to start with $100 billion in capital, mostly from China. Some experts point to... Question: In what aspects do The United States and Japan show worry for AIIB? Options: A: Regulation and running B: Raising money and investment C: The number of joining countries D: China's influence in it
A

Read the article and select the best answer. Article: An astronomer is making a case for launching pop singer Justin Bieber into suborbital space aboard a private rocket ship. The idea is not to rid the world of the Canadian teenager -- he would come back down to Earth eventually, after all -- but rather to help jump-start the emerging suborbital spaceflight industry. It would generate a lot of public interest, which would help commercial spaceflight pick up some much-needed momentum, said Seth Shostak, senior astronomer at the Search for Extraterrestrial Intelligence (SETI) Institute in Mountain View, California. "If there's more interest, there are more customers. If there are more customers, there's more technical development. It's a positive feedback loop, and obviously that's good." Such missions would return to Earth without completing a full lap around the planet. Instead, the flights would hit the edge of space about 62 miles (100 kilometers) above Earth, experience a few minutes of weightlessness, then re-enter the atmosphere and land back at a spaceport. None of these firms are ready to fly customers yet, but some are getting close. For instance, Virgin Galactic hopes to begin powered test flights of its SpaceShipTwo vehicle later this year, with commercial operations perhaps beginning in 2013 or 2014. It is SpaceShipTwo that reportedly grabbed the attention of Beyonce and Jay-Z. Virgin Galactic has collected deposits from nearly 500 customers willing to pay $200,000 for a ride aboard SpaceShipTwo, and both Virgin and XCOR have inked deals to fly scientists and their experiments on research flights. So a suborbital market already exists -- but Shostak is thinking about ways to make it grow. A celebrity launch isn't Shostak's only idea. Suborbital firms should also promote their activities aggressively via social media, Shostak said, and they should make sure their spaceships are bristling with cameras both inside and out, to give the public dramatic views of every mission. Some observers view commercial suborbital spaceflight as a potentially... Question: What can we infer from the text? Options: A: SpaceShipTwo will be the first to fly. B: Famous people will be the main passengers in the future. C: The space trip is still in preparation. D: Every space trip will be made into a film.
C

*Question*
Read the article and select the best answer. Article: Long-time exposure to air pollution can lead to physical changes in the brain and cause trouble in learning and memory, and even anxiety. This is suggested by the results of new research on mice. While other studies have shown the harmful effects of polluted air in the lungs and heart, this is the first to show the negative effect on the brain. The team of Laura Fonken, Randy Nelson , from the Ohio State University, the USA, has spread to the brain a previous line of research which found that fine particulate matter floating in the air mainly because of air pollution caused by humans, causes swelling in much of the body, and may be related to high blood pressure problems, and some other diseases. In the research Fonken and his colleagues exposed mice to polluted air for six hours each day, five days a week, over a period of 10 months, almost half the average life length of mice. Polluted air contains fine particles created by cars, factories and natural dust. Fine particles of this kind are tiny, about 2.5 micrometers in diameter , or about one-thirtieth the width of a human hair. These particles can go deep into lungs and other organs. The concentration of this particulate material to which they exposed mice is equal to the concentration at which people can be exposed in some polluted urban areas. After a period of 10 months, the researchers got the animals to have a series of behavioral tests. Both the behavior of mice and the results of neurological tests done to them show that those within the polluted air had more problems in learning and memory, and higher levels of anxiety. The results suggest that long-time exposure to polluted air can have measurable negative effects on the human brain and can cause a variety of mental health problems. This could have important consequences for those living and working in polluted urban areas. Question: Which of the following is the best title for the passage? Options: A: Long-time Exposure to Air Pollution B: Evidence and Concern of Air Pollution C: Measurable Effect on Human Brain D: Mental Problems Caused by Air Pollution
**Answer**
D