Read the following article and select the best answer. Article: A machine that takes sweat-laden clothes and turns the moisture into drinking water is in use in Sweden. The device spins and heats the material to remove the sweat, and then passes the vapor through a special membrane designed to only let water molecules get through. Since its Monday launch, its creators say more than 1,000 people have "drunk others' sweat(h)" in Gothenburg. They add the liquid is cleaner than local tap water. The device was built for the United Nation's child-focused charity UNICEF to promote a campaign highlighting the fact that 780 million people in the world lack access to clean water. The machine was designed and built by engineer Andreas Hammar, known locally for his appearances on TV tech show Mekatronik. He said the critical part of the sweat machine was a new water purification component developed by a company named HVR in collaboration with Sweden's Royal Institute of Technology. "It uses a technique called membrane distillation ," he told the BBC."We use a substance that's a bit like Gortex that only lets steam through but keeps bacteria, salts, clothing fibers and other substances out."They have something similar on the International Space Station to treat astronaut's urine - but our machine was cheaper to build. Volunteers have been sampling the treated sweat since the start of the week in Gothenburg ."The amount of water it produces depends on how sweaty the person is - but one person's T-shirt typically produces 10ml , roughly a mouthful." The equipment has been put on show at the Gothia Cup - the world's largest international youth football tournament. MattiasRonge, chief executive of Stockholm-based advertising agency Deportivo - which organized the stunt - said the machine had helped raise awareness for UNICEF, but in reality had its limitations. "People haven't produced as much sweat as we hoped - right now the weather in Gothenburg is lousy," he said."So we've installed exercise bikes alongside the machine and volunteers are cycling like crazy."Even so, the demand for... Question: What can we infer from the passage ? _ . - The water processed by the machine is cleaner than local tap water . - The machine can help raise awareness of lacking water in the world . - The machine is cheaper than the similar one on the International Space Station - The amount of water the machine produces is roughly a mouthful.
The machine can help raise awareness of lacking water in the world .

Read the following article and select the best answer. Article: Many pets got separated from their families almost two years ago, when Superstorm Sandy hit the East Coast. A New Jersey family was one of them. They lost their dog. He got away from their backyard during the storm. Chuck James said that his family searched for the brown-and-white dog named Reckless for months after the October 2012 storm. Reckless was a cute dog which brought much pleasure to the whole family, and the youngest daughter Tiffany loved him most. They played together, watched TV together, ate popcorn together and Reckless even saw Tiffany off when she headed for the kindergarten every morning. Chuck James kept searching for the lovely dog in every possible way, but no luck "We reported him missing and called the shelters from time to time, just hoping they had him," James said. "We always kept our hopes up, but finally it was time to move on." James said the family had planned to get a new dog. The dog was to be a tenth birthday surprise for their eldest daughter, Ally. The family of five went to the Monmouth County SPCA( Society for the Prevention of Cruelty to Animals) to adopt a new animal. When James and his wife walked close to the first cage, they saw a familiar face inside. "He was a little bigger than I remembered because they had fed him well," James joked. "But then he was lying on my wife's feet and I knew it was him. It was unbelievable. I know this dog is meant to be with our family." When SPCA officials asked if they could prove the animal was their dog, a friend sent a _ showing the family, with their dog before Sandy hit the East Coast. "We're all so happy to have him back." James said. The family is living in hotel while their home is being repaired. This weekend, the James went on camping trip with Reckless to celebrate the dog's return Question: What is the text mainly about? - A dog got separated from his family in a storm. - A lost dog found his way home with difficulty. - A family looked for a new dog but found the old one instead. - Dogs are always devoted friends of human beings.
A family looked for a new dog but found the old one instead.

Read the following article and select the best answer. Article: One day, a poor boy who was trying to pay his way through school by sending newspapers door to door, was so hungry that he decided to beg for a meal at the next house. However, he lost his nerve when a lovely young woman opened the door. Instead of a meal he asked for a drink of water. She thought he looked hungry so she brought him a large glass of milk. He drank it slowly, and then asked, "How much do I owe you?" "You don't owe me anything," she replied. "Then I thank you from the bottom of my heart." With these words, Howard Kelly left that house. Years later the woman became badly ill and was finally sent to the hospital in a big city. Dr. Howard Kelly, now famous, was called in. When he heard the name of the town she came from, a strange light filled his eyes. Dressed in his doctor's clothes, Dr. Kelly went into her room and recognized her at once. From that day on, he gave special attention to her, and decided to do his best to save her life. At last the woman was saved. Dr. Kelly asked the business office to pass the final bill to him. He looked at it and then wrote something on the side. The bill was sent to the woman's room. She was afraid to open it because she was sure that it would take the rest of her life to pay for it off. Finally she looked, and the note on the side of the bill caught her attention. She read these words: "Paid in full with a glass of milk, Dr. Howard Kelly." Tear of joy flooded her eyes. Question: After Dr. Kelly knew who the woman was, he _ . - began to take good care of her himself - decided to try his best to save her - told her she once gave him a glass of milk - asked for her bill and paid it off at once
decided to try his best to save her