Read the following article and select the best answer. Article: Scientists believe that one of our most important means of knowing what is going on around us is the sense of sound. We are warned of danger by sounds. Sounds serve to please us in music. Sound has a waste product, too, in the form of noise. Noise has been called unwanted sound. Noise is growing and it may get much worse before it gets any better. In order to know how noise affects people and animals, scientists have been studying for several years. They are surprised by what they have learned. Peace and quiet are becoming harder to find. Noise pollution is a threat that should be looked at carefully. Sounds is measured in units called decibels . At a level of 140 decibels people feel pain in their ears. Trucks , buses , motorcycles, airplanes, boats, factories---all these things make noise. They trouble not only our ears, but minds and bodies as well. There is a saying that it is so noisy that you can't hear yourself think. Doctors who study noise believe that we must sometimes hear ourselves think. If we don't, we may have headaches, other aches and pains, or even worse mental problems. Noise adds more tension to a society that has already faced enough stress. Question: When sound is turned into noise, _ . - people grow worse and worse - it makes us forget all the past - people don't know what to do with everyday life - it will be a kind of pollution to people
it will be a kind of pollution to people

Read the following article and select the best answer. Article: Cuba's former leader, Fidel Castro,died at the age of 90,according to a November 25 announcement on Cuban state television. The death marks the passing of a controversial figure who made a major impact on international affairs during his long rule. The Cuban government declared nine days of official mourning. On Monday, thousands of Cubans lined up near Havana's Plaza of the Revolution to pay their final respects to their leader. On Wednesday,Castro's ashes will begin a three-day journey across Cuba to Santa Ifigenia cemetery in Santiago de Cuba. Castro was born into a middle-class family on August 13 1926. He spent his childhood alongside the laborers on his father's plantation . In 1945, Castro entered the University of Havana as a law student. He later joined groups that sought to end dictatorships in Latin-American countries. On July 26. 1953,Castro staged an unsuccessful revolt against Batista's government. He and his brother Raul were captured and imprisoned for two years. After they were freed, the brothers went into exile in Mexico, On November 25, 1956,Castro set out once again to overthrow Batista. His revolution grew in strength. On New Year s Day 1959, Batista fled from Cuba. Castro took absolute power on January 8. The U.S. viewed Castro's relationship with the Soviet Union as a threat. In 1961,President John F. Kennedy approved the invasion of Cuba by 1,500 Cuban exiles. They landed on April 17 at the Bay of Pigs, but with little U. S. military support. Cuban troops smashed the attack within a few days. In October 1962,Castro confronted Kennedy during the Cuban Missile Crisis, during which he allowed the Soviet Union to place nuclear-capable missiles in Cuba. By that time, the U. S. had cut all relations with Cuba. After the Soviet Union collapsed in 1991,Cuba lost its economic support. To fuel the economy, the Cuban government allowed outside investment in hotels and resorts, but that created inequality. Meanwhile, Castro continued to crack down on any opposition. After undergoing intestinal... Question: What did the Cuban Missile Crisis result in directly? - Batista fled from Cuba. - The U. S. cut all relations with Cuba. - The U. S. viewed the Soviet Union as a threat. - President John F. Kennedy approved an invasion of Cuba.
The U. S. cut all relations with Cuba.

Q: Read the following article and select the best answer. Article: The goal of earthquake prediction is to give early enough warning. The U.S. Geological Survey conducts and supports research on the likelihood of future earthquakes. Scientists estimate earthquake probabilities in two ways: by studying the history of large earthquakes in a special area and the rate at which strain accumulates in the rock. Scientists study the past frequency of large earthquakes in order to determine the future likelihood of similar large shocks. For example scientists researched the large earthquakes in the San Francisco Bay region during the 75 years between 1836 and 1911. For the next 68 years, no earthquakes of magnitude 6 or large occurred in the region. Beginning with a magnitude 6 shock in 1979, the earthquakes in the region increased dramatically; between 1979 and 1989, there were four magnitude 6 or greater earthquakes, including a magnitude 7.1 earthquake. So scientists estimated that the probability of a magnitude 6.8 or larger earthquake occurring during the next 30 years in the region is about 67 percent. Another way to predict earthquakes is to study how fast strain accumulates. When plate movements build the strain in rocks to a critical level, like pulling a rubber band too tight, the rocks will suddenly break and slip to a new position. Scientists measure how much strain accumulates along a fault each year, how much time has passed since the last earthquake, and how much strain was released in the last earthquake. This information is used to calculate the time required for the accumulating strain to build to the level that results in an earthquake. This simple model is so complicated that such detailed information about faults is rare. In the United States, only the San Andreas Fault System has adequate records for using this prediction method. Scientific understanding of earthquakes is of vital importance to the Nation. As the population increases, expanding urban development and construction encroach upon areas susceptible to earthquakes. With a greater understanding... Question: What is the critical factor of forming a fault? - The material of rocks. - The existing time span of the rocks. - The plate movements around the rocks. - The amount of strain released in the last earthquake.
A: The plate movements around the rocks.

Read the following article and select the best answer. Article: A lot of grown-ups worry that spending too much time playing video games isn't good for a kid's health. Now some doctors have noticed that kids who bring their hand-held game players to the hospital seem less worried about being there. These patients also seem to experience less pain when they are concentrating on a superhero adventure or a car race. At the Johns Hopkins Children's Center in Maryland, young patients are finding hospital visits easier to deal with, thanks to a test program called the Hospital-based On-line Pediatric Environment (HOPE). Patients in HOPE have a life-threatening condition where their kidneys no longer filter wastes from their blood. To get their blood cleaned, these kids must be hooked up to dialysis machines at the hospital three times a week, for at least three hours each time. HOPE allows kids to play online sports, racing, and adventure games with each other. Eventually they will be able to connect with kids in other hospitals who are suffering from the same problem. "We want to use the power of the Internet to bring together kids who feel that they are separated by their illness, and let them know that they are not alone," said Arun Mathews, the doctor who heads the program. He loves video games himself and got the idea to connect kids all over the country. Many researchers elsewhere are testing video game programs that might help young patients. For example, nine-year-old Ben Duskin of San Francisco, who was struggling with cancer helped to design a video game where players get rid of cancer cells. That's all great news, because doctors already know that reducing pain and worry helps patients heal faster. Question: Which of the following plays the most important role in the HOPE project? - Music. - The Internet. - Novels. - Films.
The Internet.