Question: Jayson McCarthy, 12, was born without fingers on his left hand. That didn't stop him from being able to do many tasks. But Jayson could not grasp more than one object at a time. So Jayson 's father, Paul, created a Prosthesis , using a 3D printer. Now Jayson has fingers that open and close. "It was a do-it-yourself, father-and-son adventure," says Paul. When Jayson was a baby, his doctor advised his parents not to give him a prosthetic hand until he was in his early teens. "The doctor said Jayson should first learn to get full use out of the hand he was born with," says Paul. As Jayson got older, his father looked into _ a prosthetic hand, which can cost as much as $30,000. Paul found a more affordable solution. One day, Paul discovered a video on the Internet about Robohand, a prosthesis created with a 3D printer. He downloaded the free instructions and called Robohand's creators for advice. They told him all he needed was a 3D printer--which costs around $2,000--and some materials. Luckily, Jayson 's school had recently purchased a 3D printer and it offered to help Paul build the hand for Jayson n. "We used a soccer shinguard , cardboard , and tape. They cost about $10," says paul. With his new hand, Jayson can do things better. "I can help my mom more, because now I can carry two grocery bags," he says. Jayson 's father has already built several hands for Jayson. Jayson helps design each one. He says there's one thing in particular that he wants to do with a future prosthesis. "The goal," he says, "is to be able to tie my shoelaces ." Jayson 's father managed to get Jayson a new hand by _ . A) collecting money on the Internet B) buying a prosthetic hand C) buying a 3D printer D) printing a hand
Answer: D

Question: A breathtaking trick potentially left over from our ancestors might be found in us -- the ability to sense oxygen through our skin. Amphibians, animals such as frogs that can live both on land and in water, have long been known to be capable of breathing through their skin. In fact, the first known lungless frog that breathes only through its skin was discovered recently in the rivers of Borneo. Now the same oxygen sensors found in frog skins and in the lungs of mammals have unexpectedly been discovered in the skin of mice. "No one had ever looked," explained Randall Johnson, a biologist researcher. Mice and frogs are quite distant relatives, so the fact they have these molecules in common in their skin suggests they might well be found in the skin of other mammals, such as humans. "We have no reason to think that they are not in the skin of people too," Johnson said. These molecules not only detect oxygen, but help increase levels of vital red blood cells, which carry oxygen around the body. Normal mice breathing in air that is 10 percent oxygen--a dangerously low level similar to conditions at the top of Mount Everest, and about half that of air at sea level. However, mice that had the oxygen sensor HIF-1a genetically removed from their skin failed to produce this hormone even after hours of such low oxygen. These findings, if they hold true in humans, suggest one could raise the level of oxygen circulating inside the body. This could help treat lung diseases and disorders such as anemia without injecting drugs, which make up a multibillion-dollar market, Johnson said. Athletes also often try to get more oxygen delivered to their muscles in order to improve their performance. They often do this by training at high altitudes or in low-oxygen tents. The new study suggests they might want to expose their skin as well as breathing in low-oxygen air to improve their performance. "It's hard to say what exactly might be done, however--there's a lot we don't know yet," Johnson explained. The scientists... The best title of the passage may be _ . A) Humans Might Sense Oxygen Through Skin B) Frogs And Mice Are Distant Relatives C) First Known Animal Breathes Through Skin D) Great Findings Benefits Athletes A Lot
Answer: A

Question: "A good book for children should simply be a good book in its own right" says Mollie Hunter. Born and brought up near Edinburgh,Mollie has devoted her talents to writing primarily for young people. She firmly believes that there is and should always be a wider audience for any good book whatever its main market is. In Mollie's opinion it is necessary to make full use of language and she enjoys telling a story,which is what every writer should be doing. "If you aren't telling a story, you're a very dead writer indeed." She says. With the chief function of a writer being to entertain,Mollie is indeed an entertainer. "I have this great love of not only the meaning of language but of the music of language," she says. "This love goes back to early childhood. I had a school teacher who used to ask us what we would like to be when we grew up and,because my family always had dogs,and I was very good at handling them,I said I wanted to work with dogs,and the teacher always said 'Nonsense,Mollie;dear,you'll be a writer.' So finally I thought that this woman must have something,since she was a good teacher and I decided when I was nine that I would be a writer." This childhood intention is described in her novel,A Sound of Chariots,which although written in the third person is clearly autobiographical and gives a picture both of Mollie's ambition and her struggle towards its achievement. Thoughts of her childhood inevitably brought thoughts of the time when her home was still a village with buttercup meadows and strawberry fields--sadly now covered with modern houses. "I was once taken back to see it and I felt that somebody had lain dirty hands all over my childhood. I'll never go back,"she said "Never. When I set one of my books in Scotland" she said "I can recall my romantic feelings as a child playing in those fields,or watching the village blacksmith at work. And that's important because children now know so much so early that romance can't exist for them, as it did for us." What do we learn about Mollie Hunter as a young child? A) She didn't expect to become a writer. B) She didn't enjoy writing stories. C) She didn't have any particular ambitions. D) She didn't respect her teacher's views.
Answer:
A