Read the following article and select the best answer. Article: Some wonderfully creative uses of X-rays have been in the world of art.But the most impressive one is to uncover what has been covered up.Details unfolded by an X-ray of a painting can ' t be seen any other way.For example, in the past, paintings were often repaired if small pieces of paint fell off the canvas . These repairs cannot be seen just by looking at the painting.It takes an X-ray to discover where the repairs have been made. An X-ray of a painting is one of the best ways to tell if it was created by a famous painter or if it is a forgery .If there is a question as to whether an old master has painted a certain painting or not, X-rays are made and compared to those of paintings that are known to be original.If the brushstrokes , for example, are shown to be totally different than in other work done by a certain artist, then the painting is proved to be a fake copy. Since modern paints are usually made from different materials than paints of hundreds of years ago, the image they leave on an X-ray film looks different.This is another way X-rays can be used to spot a forgery.A modem artist will try to make a forgery look hundreds of years old by painting dirty varnish on it or by using artificial means to get the varnish to look cracked.To the naked eye the forgery may look old, but when a careful study of the X-ray image is made, the _ is obvious. It was common many years ago for an artist to finish a painting, decide it wasn't any good, and paint a completely different picture on top of it.Or artists would paint over others' work --it was their version of recycling.Taking an X-ray is the only way to find out if there is a picture underneath the picture you see with your eyes.Sometimes museums will be more interested in the painting beneath than the one on top, and will restore the older one by having the top layer painstakingly removed. Question: What is the main purpose of the article? - To provide information to police who are looking for stolen art. - To persuade art dealers to check for fake copies before selling art. - To explain how modern technology can be applied in unique ways. - To help artists restore damaged artwork to its original appearance.
To explain how modern technology can be applied in unique ways.

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Read the following article and select the best answer. Article: Sunday, 31 August We've been in China for a month now. Dad, Mom, Harry and I moved to Tianjin on 25 August. We're not very far from Beijing. Two days ago, we celebrated my 16thbirthday. It was great celebrating in China; the only thing that was strange was the cake--here they're not as sweet as the ones in New York. On Monday school starts--I wonder what it will be like. Monday, 1 September On my first day I was looking around for a locker to put my books in. However, here all the students keep all of their books at their desks--we stay in the same classroom because apparently we don't have to go from class to class--teachers come to us! Today we selected teacher assistants for each subject. Their duties are to collect homework, make announcements, and do other stuff for the teacher and the students. It's kind of a big deal here! Since I am from the US, I was asked to be the English assistant. I felt so proud but quite nervous at the same time because I wasn't sure what I had to do, but I accepted the job anyway. Friday, 3 October Boy, what a week! Now we have nine classes every day, including the morning class, a combination of our American schools' "Homeroom" and "Study Hall". I think Chinese students work too much! I have to do my homework when I get back home. I don't even have time to watch TV or surf the Internet like before. I sometimes miss New York and my school because we didn't have to study so much. We had more time to hang out with our classmates and neighbors; here, besides their usual classes, students are involved in weekend classes in subjects such as English, Chinese and math. I get a lot of attention, being from another country. Everyone wants to practice English with me! A really cute girl even asked me for my phone number on my second day and sent me a text message! I'm making a lot more friends now. I just need a lot of help to improve my Chinese. Some students want to do a language exchange program with me. Nice! Question: The passage mentions all the following points EXCEPT _ . - physics study - teacher assistants - free time activities - language exchange program
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physics study

Question: Read the following article and select the best answer. Article: Being able to count at least ten people as friends makes us happy, but those with five or fewer are likely to be miserable, researchers say. Their study of hundreds of men and women also found t hat people who feel satisfied with their lives always have lots of close friends and regularly make new ones. While it is not clear whether our friends make us happy or we make friends because we are happy, the researchers say it is clear that we should maintain our friendships. Psychologist RichardTunney said, "Whatever the reason is, actively working on friendships in the same way as to maintain a marriage is a prerequisite to happiness. "Dr. Tunney, of Nottingham University, quizzed more than 1,700 people about their satisfaction with their lives and the state of their friendships. Those with five friends or fewer had just a 40 percent chance of being happy. In other words they were more likely to be unhappy than happy. Ten was the first number at which people were more likely to be happy than unhappy. The happiest people were those with dozens of friends, according to the study, which was carried out for the National Lottery . For women, this meant having 33 friends;for men, the number was 49. Dr. Tunney said,"People who were extremely satisfied with their lives had twice the number of friends of people who were extremely dissatisfied. " Women tended to have fewer friends than men but formed tighter relationships. Interestingly, the study found that childhood friends are no more likely to make us happy than people we become close to later in life. Lottery winners, however, have a differentopinion on life. They are always happier than others despite spending their time with asmall circle of old friends. This could be because they trust people they've known for along time. Question: We can conclude from the passage that _ . - it's enough for one person to have ten friends - unhappy people must have few friends - childhood friends make people happier than adulthood ones - friendships play a major role in people's life
Answer:
friendships play a major role in people's life