Read the following article and select the best answer. Article: Millions of people visit Yosemite National Park every year to see the tall waterfalls and mountains. These mountains are a splendid sight when viewed from the valley floor. Lots of stores, hotels, and restaurants are needed to handle the crowds. Also, water, roads, and other service systems are part of the infrastructure( )that must be maintained. Unfortunately, these systems are starting to break down. It is not just in Yosemite but in national parks around the nation. Yosemite is thirty years old according to Dennis Galvin, a National Park Service worker. The park is not only old but worn out. Two or three times as many visitors come every year. That is too many visitors for the park to deal with. Four years ago a storm washed out a water pipeline in the Grand Canyon. The National Park Service had to send water trucks to provide water for the visitors. Last month pipe almost broke again and roads had to be closed for a while. Why hasn't the National Park Service kept up the park repairs? There is lack of money. The United States has 378 mountains, parks, and wilderness areas. Between three and four billion dollars are needed for repairs. Yosemite is one national park that does have money fro repairs. It has two hundred million dollars but cannot spend it any way it chooses. When the park workers started widening the road, they were forced to stop by the Sierra Club. The club claimed that the road work was damaging the Merced River that runs through the park. A Sierra Club lawyer, Julia Olson, feels that the infrastructure needs to be moved out of Yosemite. That way less pressure will be put on the already crowed park. Question: The main problem of Yosemite Park is its _ . - modern water pipes - overcrowdedness - lack of water - narrow roads
overcrowdedness

Read the following article and select the best answer. Article: For a commuter rushing to catch a train, a minute can mean the difference between dinner with the family and leftovers in the microwave. What most passengers don't realize is that their minute is already there. Every commuter train that departs from New York City -- about 900 a day -- leaves a minute later than scheduled. If the timetable says 8:14, the train will actually leave at 8:15. In other words, if you think you have only a minute to get that train -- well, relax. You have two. The courtesy minute, in place for decades and published only in private timetables for employees, is meant as a grace period for those who need the extra time to get off the platform and onto the train. "If everyone knows they get an extra minute, they're going to waste time doing unimportant things," explained Marjorie Anders, a spokeswoman for the Metro-North Railroad. Told of this article, Ms. Anders laughed. " _ !" she said. Entirely hidden from the riding public, the secret minute is an odd departure from the railroad culture of down-to-the-second accuracy. The railroad industry helped invent the concept of standard time, and time zones were established in the United States in the 1880s, 35 years before they were written into law. And most commuters know their train by the precise minute it departs. The trains quickly make up the minute: at all other stops, the public timetable prevails. The phantom minute does not exist at commuter railroads in Chicago, Los Angeles, Philadelphia, or San Francisco. But in New York, the secret minute dates back decades. "That's been done forever, from my knowledge," said Jack Swanberg, 70, an unofficial historian of Metro-North. "I was the trainmaster starting in 1970 and I'm sure it's been the case since 1870 for all I know." Question: The courtesy minute was hidden from the public to _ . - prevent the passengers' idleness - help invent the concept of standard time - show the railroad company's consideration - follow the ancient tradition of New York City
prevent the passengers' idleness

Read the following article and select the best answer. Article: A company advertised in the newspaper for a sales position. Details of the prerequisite , salary and benefits were given. It was also clearly stated that applicants needed to take an aptitude test and an interview. However, looking at the whole advertisement, one could not find any contact information of the company. Most interested applicants thought that it was the company's HR department's carelessness or a printing error. They therefore waited patiently for the newspaper to publish an amendment. But instead of waiting for the newspaper to publish the company details, another three applicants took the initiative to find out the company's contact information themselves. Tim did a search on the Internet. By typing the company's name, he easily obtained all the information including its contact number. Lisa called up the local telephone number search service and found out the company's office number. She called up the office and got the required contact information. Donna put in a greater effort in her search. She remembered seeing a poster by the same company in the city so she drove all the way down and made a few rounds to search for it. She finally found it together with the company's contact information. Three days after that advertisement was published in the newspaper, most interested applicants were still waiting eagerly for an amendment. On the other hand, the application letters and resumes of Tim, Lisa and Donna had already reached the hands of the company's HR manager. They were then called up for an interview. During the interview, all went well and immediately they were hired. The three of them were a little surprised at how fast things went on. They were expecting for an aptitude test as stated in the advertisement. The HR director answered them, smiling, "Our test is hidden in the advertisement itself. To be a good salesperson in this age, he or she has to be broad-minded and very importantly, does not follow rigid steps or rules. You are all clever and agile. In a short time, you've... Question: The writer wants to tell us through this passage that _ . - no contact information seen in an advertisement might not be the company's mistake - applicants should be careful not to be fooled by the company's advertisement - opportunity always belongs to whoever is active and broad-minded - there are many successful chances to be found in this age
opportunity always belongs to whoever is active and broad-minded