In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

[EX Q]: Article: Some people make art with paint, and others use pencil or clay. But Italian artist Maurizio Savini prefers to use bright pink gum--after it has been chewed. Savini makes huge sculptures of bears and even people out of used chewing gum. Each sculpture requires thousands of pieces of gum. "I like to use chewing gum because it seemed to me a material that can be used in many ways compared with those used by the conventional arts such as painting," Savini says. How does he do it? The process is a lot like working with clay. "I work the chewing gum when it is warm and shape it with a knife," says Savini. Then, he puts a chemical onto each gum sculpture to make the gum stay in place. Savini's sticky art has been shown in cities like London, Paris, and Rome, where he lives today. Savini isn't the only artist to work with gum. His pink sculptures have inspired artists all over the world to get creative with the sticky matter. London artist Ben Wilson paints small paintings onto flat pieces of chewed gum he finds stuck to streets and sidewalks. In Canada, Jason Kronenwald uses different colored gum to make portraits of famous people. Kronenwald seldom chews gum himself. Instead, his friends help chew gum for him while he's working. "At times it can make me _ , but I just pay attention to the colors I need and get the sculpture going," he says. In America, Jamie Marraccini's art depends on color, so he tests different kinds of gum before using them. To find out what color the chewed gum will become once hardened, he lets it age for up to six months. "I've created 30 works totaling more than 35,000 pieces of gum," says Marraccini. That's a lot of gum! So think twice the next time you throw away a wad of gum. Maybe what seems like trash could actually be the beginning of a great piece of art. 
 Question: Marraccini stores the gum for six months in order to   _  . 
 Options: (A) judge how hard it will be (B) know whether it is still sweet (C) examine what chemicals it contains (D) see what color it will become
[EX A]: D

[EX Q]: Article: Printing images is easy. Just select an image of a purple robot on your PC, for example, and press print. Your home printer exactly shoots drops of ink onto a flat piece of paper, creating the robot's 2-D image. "Printing" 3-D objects is different. Take the purple robot. First select a file of the 3-D printer. Immediately, the printer begins making noise, and a nozzle   releases plastic material in thin layers. In two or three hours, a 3-D purple robot is standing before you. 3-D printing has developed to the point where printers can now create high-quality objects using a variety of materials, including metals. That means 3-D printers can now make final products that meet high industrial standards. 3-D printers are already being used to make parts for racecars and jets as well as man-made limbs and hearing aids. So far, few homes have 3-D printers. That's because 3-D printing is not only new to most people but also quite expensive. To bring 3-D printing to the masses, some retail stores   plan to offer the service. For example, the Staples chain of office supply stores has announced that it will offer 3-D printing in Europe beginning in 2013. Customers will be able to submit their own 3-D designs to Staples website for printing. After the job is done, they'll pick up their item at a nearby Staples store or have it mailed to their homes. This service is sure to encourage many more people to try out 3-D printing. 
 Question: According to this article, who are 3-D printed parts already helping? 
 Options: (A) People with physical disabilities. (B) People in the solar energy field (C) People who lack suitable housing (D) People in need of computer skills
[EX A]: A

[EX Q]: Article: "I don't like my parents. They always tell me I should do this, and should not do that. It sometimes makes me angry," said Li Ping, a middle school student in Hunan. Do you have the same problem? Perhaps your parents had the same problem when they were your age long ago. Why does it seem that some parents are not so friendly in their children's eyes? One of the biggest things is when someone becomes a parent, he / she likes worrying things. They worry about everything about you, from the time you were born. They do a lot for you, though something would make you angry, because they care about you and worry about you. They worry about your choice of friends, the food you eat, your work at school, how much sleep you get, etc. All these things are part of your life. They want you to grow up healthily and happily. So how can you make things easier on yourself? It's easier than you think. Just make sure your parents know what you're doing. Get them to know your friends. Phone if you stay somewhere else so that your parents don't call every hospital in the phone book looking for your body. Say sorry to them when you make mistakes. Take responsibility   for what you have done. Talk about your ideas with them. They may talk about theirs with you. Most of all, try to think about why your parents do this or do that. They are still practicing being parents and need help you can give them. Someday, when you become a parent, they may be able to help you know how to get on with your children. 
 Question: What does the writer think we should do if we go back home later than usual? We should   _  . 
 Options: (A) tell our friends (B) tell the teacher (C) say sorry to our parents (D) make a telephone call to our parents
[EX A]:
D

