*Question*
Read the following article and select the best answer. Article: Back in old times, people had little knowledge about the universe and nature. Things we now consider to be common sense were mysteries to our ancestors. Over the years, major breakthroughs have been made in science and many phenomena have been explained. But still, there are always questions we can't yet answer, and The Guardian has listed some of them. 1. What makes us human? Just looking at your DNA won't tell you - human DNA is 99 percent _ to that of the chimpanzee and, believe it or not, 50 percent identical to a banana's! A lot of the things we once thought were unique about us - language and tool use, recognizing ourselves in the mirror and so on - have since been seen in other animals. Perhaps it's our culture that makes the difference or maybe our ability to use fire. It's also possible that our capacity for co-operation and our trading skills are what make us unique. 2. Why do we dream? Given the fact that we spend around a third of our lives sleeping, shouldn't we know everything about it? Unfortunately, scientists are still searching for a complete explanation of what happens when we sleep and why we dream. Austrian psychologist Sigmund Freud believed dreams were the expressions of wishes that we can't fulfill in our real lives. Others have wondered whether dreams are just random "noise" coming from a sleeping brain. 3. Could we someday live forever? Apart from accidents, most people die because of diseases that can be treated and aging. And since many diseases, such as diabetes and cancer, are diseases of aging, treating aging itself could be the key to extending our lives. Our knowledge of what causes us to age - and what allows some animals to live longer than others - is expanding rapidly. And though we haven't quite worked out all the details, we've worked out some pieces of the puzzles such as DNA damage and metabolism , which are all leading to the invention of drugs that can slow down the aging process. If we're lucky enough to lengthen our lives, we might even get to see the day when... Question: Chimpanzees and bananas are mentioned as examples to prove that _ . - human beings are actually not different from other animals - animals have completely different DNA from that of plants - both animals and plants share the same amount of DNA - DNA alone is not good enough to make humans different
**Answer**
DNA alone is not good enough to make humans different

*Question*
Read the following article and select the best answer. Article: Henry Ford grew up on an un-electrified farm, and as a young man he followed Edison's career as the inventor became a national role model.Ford took a job at the Edison Illuminating Company working his way up to chief engineer. In 1896 Ford was thirty-three and, though still working for Edison Co.,he had created his first experimental automobile the Ford Quadricycle2 during his off-time. At an Edison company party in New York, Ford had his first chance to meet his hero Edison and was able to explain his new automobile to the great inventor. _ Young man, that's the thing! You have it! Your car is self-contained and carries its own power plant." Edison himself had been working on the idea, but had only been considering electricity as the power source, so the idea of a gas engine was a somewhat new one. The words comforted Ford greatly, who immediately set out building a second car which was to become the Model-T.6.The two men became f'ast friends and would go on camping trips together.When Edison later became limited to a wheelchair, Ford brought an extra one to his house so they could race.At the 50th anniversary of the invention of light-bulb, Ford honored Edison.When Edison spoke, he ended his speech directed at Ford:" As to Henry Ford, words fail to express my feelings.I can only say that he is my friend." Therefore it is no surprise that Ford wanted something to remember Edison by after he passed away in 1931. Once, Ford asked Thomas Edison's son Charles to sit by the dying inventor's bedside and hold a test tube next to his father's mouth to catch his final breath. Ford was a man with many strange behaviors( as was Edison)including some interest in reanimation and spiritualism and some say that he was attempting to catch Edison's soul as it escaped his body in hopes of later bringing the inventor back to life. The test tube itself didn't turn up until 1950 when it was listed in the Ford possessions after Clara Ford's passing away, and then lost again until 1978 when it was discovered in an exhibit... Question: The 61ast breath' test tube" can probably be regarded as _ . - a symbol of a friendship and memory - a witness to a scientific breakthrough - a failure to bring Edison back to life - a sign of the two inventors' poor behavior
**Answer**
a symbol of a friendship and memory

*Question*
Read the following article and select the best answer. Article: A group of eight public high school students in Massachusetts, aged l5 to l7,designed and ran their own school within a school. They named their practice the Independent Project. They represented the usual range: two were close to dropping out before they started the project,while others were honors students. Their guidance teacher was their adviser, consulting with them when the group encountered difficulties. Though they sought advice from English,math and science teachers, they were responsible for monitoring one another's work and giving one another feedback. There were no grades, but at the end of the term,the students wrote evaluations of their classmates. The students also designed their own course. In addition to some regular courses,they each took on an 'individual project',learning to play the piano or to cook,writing a novel or making a video about domestic violence. At the end of the term,they performed their new skills in front of the entire school. The last part of their self - designed course was to do a 'collective project' that had social significance. Because they felt the whole experience had been so life - changing,they ended up making a film showing how other students could start and run their own schools. The project was a success. After returning to their traditional study,the students have high motivation and are doing well. One student who had failed all of his previous math courses spent three weeks teaching the others about probability. The lesson learned here is that if students are given the opportunity to take control or contribute significantly to their own learning they will become more accomplished,more engaged and more knowledgeable. The students in the project are remarkable because they demonstrate the kinds of learning and personal growth that are possible when teenagers feel ownership of their high school experience,learn things that matter to them and learn together. Question: The students involved in the Independent Project _ . - didn't need to learn common lessons - tended to escape from the whole society - were unwilling to share their experiences - focused on self-study and working together
**Answer**
focused on self-study and working together