Question: Since the 1970s, scientists have been searching for ways to link the brain with computers.Brain-computer interface(BCI) technology could help people with disabilities send commands to machines. Recently, two researchers, Jose Millan and Michele Tavella from the Federal Polytechnic School in Lausanne, Switzerland, demonstrated a small robotic wheelchair directed by a person's thoughts. In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand.He could even talk as he watched the vehicle and guided it with his thoughts. "Our brain has billions of nerve cells.These send signals through the spinal cord to the muscles to give us the ability to move.But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the muscles," Tavella says."Our system allows disabled people to communicate with external world and also to control devices." The researchers designed a special cap for the user.This head cover picks up the signals from the scalp and sends them to a computer.The computer interprets the signals and commands the motorized wheelchair. The wheelchair also has two cameras that identify objects in its path.They help the computer react to commands from the brain. Prof.Millan, the team leader, says scientists keep improving the computer software that interprets brain signals and turns them into simple commands."The practical possibilities that BCI technology offers to disabled people can be grouped in two categories: communication, and controlling devices.One example is this wheelchair." He says his team has set two goals.One is testing with real patients, so as to prove that this is a technology they can benefit from.And the other is to guarantee that they can use the technology over long periods of time. The team will test with real patients to  _ A) make profits from them B) prove the technology useful to them C) make them live longer D) learn about their physical condition
Answer: B

Question: Henry was a carpenter of our village. Once I asked him to make a table for my family. A week later, Henry sent us the table and the bill as well. My wife said to me, "It's a beautiful table, dear, isn't it?" "I won't decide about that until I see the bill." I said. Henry was drinking a glass of water. He laughed and gave me a piece of paper. It said, Bill One dining table                 June 10, 2011 Cost of wood                       17.00 Paint                               1.50 Work, 8 hours (1 an hour)             8.00 Total                          36.50 When I was looking at the bill, Henry said," It's a fine day, isn't it? Quite sunny." "Yes," I said. "I'm glad it is only the 10th of June." "Me too, " said Henry." You wait. It will be a bit hotter by the end of the month." "Yes, hotter and more expensive. The table will be 20 more expensive on June 30th, won't they, Henry? " I said, "If it isn't too much trouble, please add it up again. You can forget the date." "OK, man. You are such a guy." Henry said with a smile in his two blue eyes, and he left with the money he should get. In Henry's opinion the write was a   _   guy. A) smart and careful B) silly and lazy C) rich and hardworking D) stupid and rich
Answer: A

Question: Your glasses may someday replace your smartphone, and some New Yorkers are ready for the switch. Some in the city can't wait to try them on and use the maps and GPS that the futuristic eyewear is likely to include. "I'd use it if I were hanging out with friends at 3 a. m. and going to the bar and wanted to see what was open," said Walter Choo, 40, of Fort Greene. The smartphone-like glasses will likely come out this year and cost between $250 and $600, the Times said, possibly including a variation of augmented  reality, a technology already available on smartphones and tablets   that overlays information onto the screen about one's surroundings. So, for example, if you were walking down a street, indicators would _ showing you the nearest coffee shop or directions could be plotted out and come into view right on the sidewalk in front of you. "As far as a mainstream consumer product, this just isn't something anybody needs," said Sam Biddle, who writes for Gizmodo.com. "We're accustomed to having one thing in our pocket to do all these things," he added, "and the average consumer isn't gonna be able to afford another device   that's hundreds and hundreds of dollars." Google publisher Seth Weintraub, who has been reporting on the smartphone-like glasses since late last year, said he is confident that this type of wearable device will eventually be as common as smartphones. "It's just like smartphones 10 years ago," Weintraub said. "A few people started getting emails on their phones, and people thought that was crazy. Same kind of thing. We see people bending their heads to look at their smartphones, and it's unnatural," he said. "There's gonna be improvements to that, and this is a step there. " According to Sam Biddle, the smartphone-like glasses are   _  . A) necessary for teenagers B) attractive to New Yorkers C) available to people worldwide D) expensive for average consumers
Answer:
D