Read the article and select the best answer. Article: Dogs may not know exactly what you are doing especially when you're trying to figure out a square root or diagram a sentence. But according to a new study, dogs can understand what we're thinking and feeling by reading our facial expressions and body language and following our eyes. Researchers studied 29 dogs. The dogs were shown a movie where a woman looked directly at them and said "Hi dog!" Then, the woman looked at a flowerpot sitting next to her. The researchers found that when the woman looked at and spoke directly to a dog, the dog usually followed her eyes to the flowerpot. It proved that the dogs knew that the woman was thinking about the flowerpot. "By following the eye movements of dogs, we were able to get a first-hand look at how their minds are actually working," said Jozsef, the senior researcher. Later in the movie, the woman said "Hi dogs" in a low voice and didn't look at the dog before looking at the flowerpot. In that situation, the dogs didn't seem to understand what the woman was thinking. There was no eye contact, and the woman didn't appear to speak to the dogs directly. That comes as no surprise to dog trainer Jones. "Dogs normally speak through nonverbal signals. It's more natural to them," she said. "If you've ever watched dogs at a dog park, you've seen it. Within 30 seconds they enter the park, much information has passed between the new dog and the ones already in the park. They're exchanging looks, observing eyes and body posture. On the other hand, when you speak to a dog, they are learning a foreign language." Picking up your nonverbal signals seems more natural. So, if you were hoping that all this means your dog could help you solve your math problems, you're probably out of luck. But he or she might a lot more what you're thinking than you previously thought. Question: According to the text, Jones finds that _ . Options: A: dogs usually speak through verbal signals B: dogs learn a great deal more at a dog park C: dogs can understand humans' words easily D: dogs speak through eyes and body language
D

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Read the article and select the best answer. Article: See a cellphone cover that you like on Taobao? Forget about placing an order, paying the bill online and waiting for days for it to be delivered to you. In the near future, you'll be able to get it in minutes just by hitting "print" on your computer. You might find it hard to believe that you could actually "print" an object like you would a picture. But it is not that hard to understand how it would work. Just as a traditional printer sprays ink onto paper line by line, modern 3D printers spread material onto a surface layer by layer, from the bottom to the top, gradually building up a shape. Instead of ink, the materials the 3D printer uses are mainly plastic, resin and certain metals. The thinner each layer is--from a millimetre to less than the width of a hair--the smoother and finer the object will be. This may sound like a completely new technology, but the truth is that 3D printing has been around since the late 1980s. Back then, it was barely affordable for most people, so few knew about it. Last year, though, saw a big change in the 3D printing industry--printers became much cheaper. For example, 10 years ago a desktop 3D printer might have cost PS20,000, while now they cost only about PS1,000, according to the BBC. Taken out of the factory and introduced to more diverse and common uses, 3D printing can create just about anything you can think of--flutes , bikinis, jewelry, aircraft parts and even human organs. In fact, scientists from Cornell University in New York have just made an artificial ear using a 3D printer, according to Science Daily. The fake ear looks and acts exactly like a natural one. However, as 3D printing becomes more common, it may bring about certain problems--such as piracy. "Once you can download a coffee maker, or print out a new set of kitchen utensils on your personal 3D printer, who will visit a retail store again?" an expert in 3D printing told Forbes News. Even more frightening, what if anyone in the world could use a 3D printer to print out a fully functioning gun? Question: According to the article, in the future, the 3D printing technology will _ . Options: A: enable people to make better purchases online B: change the way we make many products C: be applied as widely in our daily life as computers D: shorten the time it takes for people to get what they buy online
(Answer)
B

Question: Read the article and select the best answer. Article: Why do Americans struggle with watching their weight, while the French, who consume rich food, continue to stay thin? Now a research by Cornell University suggests how life style and decisions about eating may affect weight. Researchers conclude that the French tend to stop eating when they feel full. However, Americans tend to stop when their plate is empty or their favorite TV show is over. According to Dr. Joseph Mercola, a health expert, the French see eating as an important part of their life style. They enjoy food and therefore spend a fairly long time at the table, while Americans see eating as something to be squeezed between the other daily activities. Mercola believes Americans lose the ability to sense when they are actually full. So they keep eating long after the French would have stopped. In addition, he points out that Americans drive to huge supermarkets to buy canned and frozen foods for the week. The French, instead, tend to shop daily, walking to small shops and farmers' markets where they have a choice of fresh fruits, vegetables, and eggs as well as high-quality meats for each meal. After a visit to the United States, Mireille Guiliano, author of French Women Don't Get Fat, decided to write about the importance of knowing when to stop rather than suggesting how to avoid food. Today she continues to stay slim and rarely goes to the gym. In spite of all these differences, evidence shows that recent life style changes may be affecting French eating habits. Today the rate of obesity - or extreme overweight - among adults is only 6%. However, as American fast food gains acceptance and the young reject older traditions, the obesity rate among French children has reached 17% - and is growing. Question: Where does this text probably come from? Options: A: A health report B: A book review C: A TV interview D: A food advertisement
Answer:
A