Article: Life on Mars could become a reality and it could happen in your lifetime. A welcoming planet Scientists say Earth's neighbor Mars, a bright red planet about half Earth's size, is the most likely to support human life. Mars even has frozen water on its surface. Since the late 1990s, NASA has been exploring Mars using remote-controlled vehicles . Most recently Curiosity, a car-size vehicle, traveled through space on an unpiloted spacecraft and landed on Mars in August 2012. Directed by NASA scientists , the vehicles move on the surface, taking pictures , collecting and analyzing soil, and looking for signs of life. But what about human explorers? Plans are already in the works to send astronauts to Mars as soon as the mid-2030s. _ But before you start packing your bags, let's consider the challenges. For starters, Mars is far away. Just getting there could take up to 10 months. Scientists already know that time away from Earth's gravity harms the human body. Bones and muscles get weaker. The body produces less blood. What damage would months and months of living in space do? And then there is the matter of water, oxygen, food and fuel. Scientists will have to find solutions to these problems, or the first humans on Mars won't survive very long in their new home. Tiny Dangers There's another tinier risk. It's so tiny that you can't even see it: germs. Some scientists believe that our germs could pollute the whole planet of Mars. Potentially killing Martian life before we have the chance to discover it. Worse, there is a small but terrifying chance that any microscopic life already there might be harmful to us . Worse still, if any of those Martian germs were brought back to Earth, the result could be disastrous. Animals, plants, and people could be wiped out. Worth the $$$? A more practical concern is the cost. The price could approach $ 1 trillion . How can we justify spending that much when so many problems--poverty, disease--could use the cash here on Earth? Question: Which of the following can best fill in the blank in the passage? Yes or no, is the answer "Extreme conditions."?
Yes

Article: This is VOA. The National Cryptologic Museum is on Fort George G. Meade, a military base near Washington, DC. The method of hiding exact meanings is called coding. People have used secret codes throughout history to protect important information. The National Cryptologic Museum celebrated 60 years of cryptologic excellence in 2012. One event there marked the sixtieth anniversary of the National Security Agency. Two former NSA workers shared their memories of operating a code machine called Sigaba. In 1940, an American woman named Genevieve Grotjan found some information being repeated in Japanese coded messages. Her discovery helped the United States understand secret Japanese diplomatic messages. After the United States understood the code, it was possible to study messages from the Japanese ambassador to Germany and to his supervisors in Japan. Understanding these messages helped the United States prepare for a possible war in the Pacific with Japan. After the attack on Pearl Harbor. the American naval commander in the Pacific Ocean was Chester Nimitz. His forces were much smaller than the Japanese Naval forces. And the Japanese had been winning many victories. Joseph Rochefort had worked for several months to read the secret Japanese Naval code called JN-25. If he could understand enough of the code, he would be able to give Admiral Nimitz very valuable information. From the beginning of 1942, the Japanese code discussed a place called "AF." Joseph Rochefort felt the Japanese were planning an important battle aimed at "AF." After several weeks, he and other naval experts told Admiral Nimitz that their best idea was that the "AF" in the Japanese code was the American-held island of Midway. Admiral Nimitz said he must have more information to prepare for such an attack. The Navy experts decided to trick Japan. They told the American military force on Midway to broadcast a false message. The message would say the island was having problems with its water-processing equipment. The message asked that fresh... Question: This passage is probably adapted from _ . Yes or no, is the answer "a broadcasting program"?
No

Article: When Mrs.Joseph Groeger died recently in Vienna,Austria,people asked the obvious question,"Why did she live to be 107?" .Answers were provided by a survey conducted among 148 Viennese men and women who had reached the age of 100.Somewhat surprising was the fact that the majority had lived most of their lives in cities.In spite of the city's image as an unhealthy place,city living often provides benefits that country living can lack.One factor seems to be important to the longevity of those interviewed. This factor is exercise.In the cities it is often faster to walk short distances than to wait for a bus.Even taking public transportation often requires some walking.Smaller apartment houses have no elevators ,and so people must climb stairs.City people can usually walk to local supermarkets. Since parking spaces are hard to find,there is often no alternative to walking. On the other hand,those who live in the country and suburbs do not have to walk every day.In fact,the opposite is often true.To go to school,work,or almost anywhere else,they must ride in cars. Question: To reach the third floor of a building, it would probably be most healthful _ Yes or no, is the answer "to walk up the stairs"?
Yes

Article: In Colombia , there are some unwritten rules that people are used to , These rules are not officially established , but people do respect them . For example , on a bus , a person keeps a distance from another person , and people don't like to touch each other . Many people come to work late because they prefer to wait for another bus if the first one is too crowded . They don't want to have to stand too close to another person , or maybe they are afraid of starting a conversation . A friend of mine in Colombia once said his mom got angry because he came home late , so he asked her , " Mom , what do you think of most people arriving at their jobs so late ? " That gave her the answer to her question since everyone knows no one wants to get on a bus that is too crowded . His mother realized at that moment that customs have a big influence on a person's life . Sometimes , people don't like to make any kind of conversation or make eye contact with others . For example , when they are in line at a bank , they prefer to look up or down rather than look at other people . Moreover , people usually look down when they are in an elevator . Not only on a bus , in line at a bank , and in an elevator do people usually avoid talking to other people , but also in the streets when they are walking , they prefer to look down and to avoid contact with others . Question: When people in Colombia are in line at banks , they _ . Yes or no, is the answer "look up or down"?
No