Each sentence has a mistake. Find it bychosing A B C or D

 Nylon, a synthetic, make from a combination of water and a by-product of coal, was first introduced in 1938

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Thirty years after ghostwriting Donald Trump’s The Art of the Deal, Tony Schwartz described the experience as like putting lipstick on a pig. He felt a “deep sense of remorse” at helping bring the man who would become president gain wider attention. This week, the writer Natalie Beach joined the grand tradition of ghostwriters speaking out about their subjects, with a deeply intimate essay in the Cut laying out how she used to ghost everything for her former friend and controversial “influencer” Caroline Calloway: from Instagram captions to the aborted book that once attracted a $375,000 (£300,000) publishing deal, until their relationship broke down irretrievably. Beach’s account says that after the pair put the book proposal together, the influencer felt unable to write it. Beach says she “bought us time with the publishers by writing a quarter of the manuscript by myself”. As a ghostwriter himself, Crofts questions the ethics of speaking out about his subjects’ lives. “I do think Tony Schwartz shouldn’t have come out and said anything about Trump, because you’ve taken the money. It’s like a lawyer: if you find that the person you’re representing is a murderer you can’t then go around bewailing the fact you defended them – that was your job,” he said. “But I think he made Trump, I don’t think Trump would be president if he hadn’t written that book for him, because he’d never have got The Apprentice without the book, and the presidency without The Apprentice. So it must be weighing heavily on his conscience.”  Ghostwriters must be good at several things – being amenable to being steered by a subject, while also being firm enough to guide them away from tangents and uninteresting details. But the most important thing in ghostwriting, says Crofts, is absence of ego. “Which is maybe what went wrong [with Calloway] – Natalie isn’t a born ghost, she’s a writer herself. She was really young and well out of her depth, completely swamped by this girl’s flamboyance,” he says. “Ghostwriters do attract a lot of fantasists and people who have ideas way above the likelihood of success. They always think their story is fantastically interesting and going to be a bestseller. You’re always dealing with people with larger-than-life egos, so there’s always a danger you’re going to run up against someone who is impossible to manage.”  
5. According to paragraph 3, what is the view of Crofts for Tony Schwartz’s story?

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Air pollution is the most prominent and dangerous form of pollution. It occurs dues to many reasons. Excessive burning of fuel which is a necessity of our daily lives for cooking, driving and other industrial activities releases a huge amount of chemical substances in the air every day; as a result, these pollute the air. Smoke from chimneys, factories, vehicles or burning of wood basically occurs due to coal burning. This releases sulphur dioxide into the air making it toxic. The effects of air pollution are evident too. Release of sulphur dioxide and hazardous gases into the air causes global warming and acid rain which in turn have increased temperatures, erratic rains and droughts worldwide making it tough for animals to survive. We breathe in every polluted particle from the air, the result is an increase in asthma and cancer in the lungs. Another effect of air pollution is ozone layer depletion. Ozone layer is the thin shield high up in the sky that prevents ultra violet rays from reaching the Earth. As a result of human activities, chemicals, such as chlorofluorocarbons (CFCs) which play a key role, were released into the atmosphere which contributed to the destruction of ozone layer. Water pollution has taken toll of all the surviving species of the earth. Almost 60% of the species live in water bodies. It occurs due to several factors; the industrial wastes dumped into the rivers and other water bodies cause an imbalance in the water leading to its severe contamination and death of aquatic species. If you suspect that nearby water sources have been contaminated by a corporation then it might be a good idea to hire an expert to see you options. Moreover, spraying insecticides, pesticides like DDT on plants also pollutes the ground water system and oil spills in the oceans have caused irreparable damage to the water bodies. Eutrophication is another big source; it occurs due to daily activities like washing clothes or utensils near lakes, ponds or rivers; this forces detergents to go into water which blocks sunlight from penetrating, thus reducing oxygen and making it inhabitable. Water pollution not only harms the aquatic beings but it also contaminates the entire food chain by severely affecting humans dependents on these. Waterborne disease like cholera, diarrhea have also increased in all places. Another type of pollution common in the countryside is soil pollution. Soil pollution occurs due to the incorporation of unwanted chemicals in the soil due to human activities. Insecticides and pesticides absorb the nitrogen compounds in the soil making it unfit for plants to derive nutrition. Release of industrial waste, mining and deforestation also damages the soil. Since plants can’t grow properly, they can’t hold the soil and this leads to soil erosion.
3. What is possibly the main factor that damages the ozone layer according to the passage?

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When it comes to cooking, boomers cook one, Generation X cooks another way and the beat generation does things that must be recorded now, because once they have passed out of fashion, they will never be discovered again. They have weird skills, derived from scarcity in their early years. They keep their spices in brown glass because they last longer. For practical purposes, this means everything is in an old Calpol bottle with “sumac” scrawled over it. Some of them are, and will fish an empty packet of sugar out of the bin, shake a quarter-teaspoon of sugar from it and put it back. They can often make a cake by eye, without weighing anything, which I find incredible, and they know what to do with leaf gelatine, which is great until it isn’t. My mother once made avocado in jelly and then said: “I don’t know, the proportions may have been slightly off.” I said, recklessly: “Don’t worry – I’m sure I’ll choke it down,” but when it came to it, my cutlery bounced off it, like a prank played on a very hungry person in a cartoon. The beat generation canon is Meat at Any Price and Fish at Any and anything to do with mince. The descent of mince from a sacred food to a bolognese-only staple is one of the great mysteries of progress, because it is delicious even when you don’t shove a load of tomato in it. But you can’t just shove cheap meat in a pan and watch while it sweats out watery grey juice. This seems to be something that only wartime generations understand. Hip parents in the 70s, or regular parents in the 80s, or quite trad parents in the 90s had a horror of overcooked carrots and waterlogged cabbage. The very smell of cooked vegetables evoked for them every bad memory of British cuisine, before anchovies and Italians and radicchio arrived, when all dinner was a school dinner. So they would all just tease their vegetables with a hint of boiling water, before turning them out, still basically a salad, only a bit warmer. Then you, their offspring, would leave home, and accidentally encounter a vegetable that had been cooked, and realise how delicious it was and now you probably overcook your vegetables a bit, and your children will go the other way.  
7. Which of the following statements is TRUE, according to the passage?

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Most of the viewers imagine that the presenter does little (1)______arrive at the  studio a few minutes before the broadcast, read the weather, and then go home. In fact, this image is far from the truth. The two-minute (2) ____ which we all rely on when we need to know tomorrow’s weather is the result of a hard day’s work by the presenter, who is actually a highly-qualified (3)_______. Every morning, after a weather forecaster arrives at the TV studios, his/her first task of the day is to collect the latest data from the National Meteorological Office. The information is very detailed and includes predictions, satellite and radar pictures, as well as more technical data. After gathering all the relevant material from this office, the forecaster has to (4)________ the scientific terminology and maps into images and words which viewers can easily understand. The final broadcast is then carefully planned. The presenter decides what to say and in what order to say it. Next a “story board” is drawn up which lays out the script word for word. The time allocated for each broadcast can also alter. This is because the weather report is screened after the news, (5)__________ can vary in length. The weather forecaster doesn’t always know how much time is available, which means that he/she has to be thoroughly prepared so that the material can be adapted to the time available.

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Chichen-Itza is protected by the 1972 Federal Law on Monuments and Archaeological, Artistic and Historic Zones and was declared an archaeological monument by a presidential decree in 1986. The site remains open to the public 365 days of the year, and received a minimum of 3.500 tourists per day, a number which can reach 8.000 daily visitors in the high season. This means that the site needs constant maintenance and attention in order to avoid deterioration of its pre-hispanic fabric. Yucatan is the only state in Mexico where two institutions are involved in the management of archaeological sites: the National Institute of Anthropology and History (INAH), which is in charge of the care and conservation of the archaeological site, and the other is Board of Units of Cultural and Tourism Services of the State of Yucatan. Medium and long-term activities at Chichen-Itza, including investigation, conservation, thematic interpretation, administration and operation of the site, are addressed in the “Management Plan of the Pre-hispanic City of Chichen-Itza”. The purpose of the Plan is to articulate and coordinate the activities at the site, especially those geared towards the mise en valeur of the property and the generation of participation of the different sectors involved in the management, including the general public. No emergency plan exists for the site and there is no long term monitoring of the state of conservation, due to lack of personnel. This puts the site at risk from natural and anthropogenic disasters, as well as from longer term degradation. Threats like fire and lime stone erosion have been highlighted. Sustainable implementation of the defined planning tools and the allocation of resources to conservation and management are necessary means to ensure the conservation of the Outstanding Universal Value of the property in the long term.
2. According to paragraph 1, why does the world renowned relics require continual preservation?

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Most sources of illumination generate light over an appreciable period, and indeed if  an object is lit for a very brief time(less that 1/25 second), the human eye will not react in time to see the object. A photographic emulsion - that is, a light-sensitive coating on photographic film, paper, or glass - will, however, record much shorter bursts of light. A photographic flash can therefore be used to capture high-speed movement on film as well as to correct deficiencies of the normal surrounding lighting. Photoflash is now generated electronically, but the earliest form, first used in 1864, was a paper bag containing magnesium wire and some oxygen-rich substance, such as potassium chlorate. When the bag was ignited, the metal burned with an intense flash. A contemporary observer reported that “this quite unsafe device seems to have done nothing worse that engulf the room in dense smoke and lead to pictures of dubious quality and odd poses.”  The evolution of the photoflash was slow, flashbulbs, containing fine wire made of a metal, such as magnesium or aluminum, capable of being ignited in an atmosphere of pure oxygen at low pressure, were introduced only in the 1920’s. In the earliest type, the metal was separated from the oxygen by a thin glass bulb. The flash was fired by piercing the bulb and allowing the oxygen to come into contact with the metal, which ignited spontaneously. Later bulbs were fired by an electric battery, which heated the wire by passing a small current through it. Other combinations, such as the pairing of oxygen difluoride with zirconium, have also been used. In each case enough energy is given out to heat the oxidizable metal momentarily to a white hot emission of visible light. The smoke particles are so small that they cool rapidly; but since they are white, they contribute to the brilliance by reflecting the light from their still glowing neighbors. A slightly bigger form of the metal will burn for a longer time. 
7. According to the passage, what helps a flashbulb burn longer?

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Mohammed BK, who aims to connect Somalis in Bristol with their heritage, has been  confirmed for the Somali Week Festival, in 2020. Mohammed BK has been named as “cultural ambassador” for the Somali community. Ayan Mohamoud who is UK’s Somaliland Ambassador told the BBC he will now become a fixed part of the annual festivities. She said: “Young people who don’t speak Somali at all have memorised his music word-for-word and that is something that has never been done before by any Somali artist. He has been touring the country promoting citizenship and cultural unity throughout his career.”  Susan Elmi, 25, has been a fan of Mohammed BK for many years. She said: "In the Somali culture many people communicated their emotions and thoughts through songs and poetry and this is going back centuries. This man is bringing that back and making the younger generation question and explore our rich legacy. I think it’s just what the Somali Diaspora needs to say well connected to the identity.”  Mohammed BK also promotes education and advises young people to “use their time and resources wisely here in the UK because that is something their parents sacrificed fleeing from their homeland”. He added: “I thought to myself if I have that much influence on thousands and thousands of young people from my community, I need to put my platform to good use in encouraging them to do good and seek opportunities”. Festival fan Ameira Hassan, 45, said: “It’s a huge thing for our kids to take part in their history and culture. It’s important to us because they are learning a lot. Twenty years ago we never used to have anything like this in the UK and our kids never had any knowledge of the Somali culture.” 
3. The word “they” in paragraph 3 refers to _______

Choose the best answer:
The manageress/ told/ Lucy/ she/ had/ finish/ work/ by 5 o’clock.

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Lead researcher on the atlas, Dr Zoë Randle, said the northerly migration of species of moths and butterflies is a phenomenon observed in northern Europe in recent decades. She said moths are proof that human-made climate change is happening now. Great Britain has observed the arrival of new species too, such as the Clifden Nonpareil, Tree-lichen Beauty and Black-spotted Chestnut. The atlas records that 38 per cent of all moth species in Britain and Ireland have spread to other areas in the last 50 years, most as a result of global warming. The book lists 893 species in all and the scientists’ analysis of distribution records over the period 1970-2016 in particular showed that 31 per cent of 390 larger moth species decreased significantly in Britain. Intensive agriculture has caused the decline of many moth species through the destruction of wildlife-rich habitats and use of fertilizers and pesticides. Widespread environmental pollution such as artificial light at night and chemicals in the air and soil, are altering plant and animal communities in ways that are still not fully understood. Humanmade climate change has facilitated the spread of moths to new parts of Britain and Ireland that were formerly too cold, while at the same time posing a long-term risk to species found in cool and restricted habitats such as mountainsides. The atlas is based on more than 25 million records sourced from Butterfly Conservation’s National Moth Recording Scheme and the Moths Ireland database. These date from the 18th century through to 2016, meaning this volume contains 275 years of mothrecording effort by the public. Dr Randle said the same system of comprehensive recording is not yet available in Ireland as it is in Britain, but anecdotally she believes the same patterns are emerging in Ireland.  
1. Which best serves as the title for the passage?

Read the following passage and choose the best answer (A, B, C, D):
Lead researcher on the atlas, Dr Zoë Randle, said the northerly migration of species of moths and butterflies is a phenomenon observed in northern Europe in recent decades. She said moths are proof that human-made climate change is happening now. Great Britain has observed the arrival of new species too, such as the Clifden Nonpareil, Tree-lichen Beauty and Black-spotted Chestnut. The atlas records that 38 per cent of all moth species in Britain and Ireland have spread to other areas in the last 50 years, most as a result of global warming. The book lists 893 species in all and the scientists’ analysis of distribution records over the period 1970-2016 in particular showed that 31 per cent of 390 larger moth species decreased significantly in Britain. Intensive agriculture has caused the decline of many moth species through the destruction of wildlife-rich habitats and use of fertilizers and pesticides. Widespread environmental pollution such as artificial light at night and chemicals in the air and soil, are altering plant and animal communities in ways that are still not fully understood. Humanmade climate change has facilitated the spread of moths to new parts of Britain and Ireland that were formerly too cold, while at the same time posing a long-term risk to species found in cool and restricted habitats such as mountainsides. The atlas is based on more than 25 million records sourced from Butterfly Conservation’s National Moth Recording Scheme and the Moths Ireland database. These date from the 18th century through to 2016, meaning this volume contains 275 years of mothrecording effort by the public. Dr Randle said the same system of comprehensive recording is not yet available in Ireland as it is in Britain, but anecdotally she believes the same patterns are emerging in Ireland.  
4. The word “anecdotally” in paragraph 3 is closest in meaning to ______

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Why has Holmes continued to (1) _________________ generation after generation when other fictional detectives of the Victorian period are forgotten? One can break the answers down into a mix of elements. But first it will be useful to summarize the life of Holmes’s (2)____________. Doyle was born in Edinburgh in 1859, one of nine children of an alcoholic Irish artist who was consigned, in later life, to a lunatic asylum. Young Arthur Doyle was educated at the fee-paying Jesuit college, Stony Hurst. (3)___________ 16 he spent a year in Austria before enrolling at Edinburgh University’s medical school. In 1880 he spent seven months in the Arctic as ship’s doctor on a whaler. The following year he graduated with a (4)__________ degree, and made another trip to Africa before setting up, less adventurously, in medical practice near Portsmouth, in July 1882. His income had reached £300 a year by 1885, enabling him to marry the sister of one of his patients. Doyle had long written on the side and in 1886 he played around with stories (5)____________ on an ‘amateur private detec-tive’, called ‘J. Sherrinford Holmes’. The outcome was the Sherlock Holmes novella, A Study in Scarlet (1887). No top-drawer publisher would take it and it was eventually serialized as a Christmas giveaway in a magazine and then as what was called a ‘shilling shocker’ – pulp fiction for the masses

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Architect Ricardo Rosa, who is working in the center of quite busy Batheaston, England, no longer has to deal with heavy traffic on his way to work. He has given up the road - now he canoes along the river between work and home. Before setting off on the three-kilometer journey to work in the nearby town of Batheaston, Ricardo puts on a special jacket and trousers over his suit so he doesn’t get wet. When he gets there, he leaves the canoe locked up with the bicycles outside his office. He began canoeing to work after he was lent a canoe by a colleague and found instructions on how to use it on the internet. The experiment has been so successful that Ricardo now says he won’t go back to driving or cycling. He says, “At first I was a bit nervous because I had never canoed before. But I’m getting much better. It’s been very windy and rainy recently and I’ve been alright. It makes the trip more exciting. I haven’t fallen into the water yet, but I’m sure I will one day and have to sit in my wet work clothes all day. Standing up to get in and out is the most dangerous point.” Some of the people he works with are now thinking of doing the same thing themselves. They already try to help the environment in other ways. The office has its own vegetable garden outside and one employee has left his home to live on a boat. Ricardo says, “I’m hoping they’ll join me. Canoeing takes longer than going by car, but it’s a lot more pleasant. It’s a great way of getting fit and breaking the routine. It feels like you’re on holiday.”  
3. How does Ricardo say he feels about canoeing?

Read and complete the  following passage.

"Nowadays people are more aware that wildlife all over the world is in (1)________. Many species of animals are threatened, and could easily become (2)________ if we do not make an effort to protect them. In some cases, animals are hunted for their fur or for other valuable parts of their bodies. Some birds, such as parrots, are caught (3)________and sold as pets. For many animals and birds the problem is that their habitat - the place where they live - is disappearing. More land is used for farms, for houses or industry, and there are fewer open spaces than there once were. Farmers use powerful chemicals to help them to grow better crops, but these chemicals pollute the environment and (4)________ wildlife. The most successful animals on earth - human beings - will soon be the only ones (5)________, unless we can solve this problem."

4. Farmers use powerful chemicals to help them to grow better crops, but these chemicals pollute the environment and (4)________ wildlife.

Read the following passage and choose the best answer for each blank.

In the western customs (26) _____ hands is the customary form of greeting, but in China a nod of the head or (27) _____ bow is sufficient. Hugging and kissing when greeting are uncommon. Business cards are often (28) _____ and yours should be printed in your own language and in Chinese. Also, it is more respectful to present your card or a gift or any other article using (29) _____ hands. The Chinese are (30) _____ applauders. You may be greeted with group clapping, even by small children. When a person is applauded in this practice it is the custom for that person to return the applause or a "thank you." When walking in public places, direct eye (31) _____ and staring is uncommon in the larger cities, especially in those areas accustomed to foreign visitors. (32) _____, in smaller communities, visitors may be the subject of much curiosity and therefore you may notice some stares. (33) _____ speaking, the Chinese are not a touch-oriented society, especially true for visitors. So, avoid (34) _____ or any prolonged form of body contact. Public displays of affection are very rare. On the other hand, you may note people of the same sex walking hand-in-hand, which is simply a gesture of friendship. Do not worry about a bit of pushing and shoving in stores or when groups board public buses or trains. In this case, (35) _____ are neither offered or expected. The Chinese will stand much closer than Westerners.

(34) _____

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The costs and benefits of global warming will vary greatly from area to area. For (1)_________ climate change, the balance can be difficult to assess. But the larger the change in climate, (2)__________ more negative the consequences will become. Global warming will probably make life harder, not easier, for most people This is mainly because we have already built enormous infrastructure based on the climate we now have. People in some temperate zones may (3)______ from milder winters, more abundant rainfall, and expanding crop production zones. But people in other areas will suffer from increased heat waves, coastal erosion, rising sea level more erratic rainfall, and droughts. The crops, natural vegetation, and (4) ________ and wild animals (including seafood) that sustain people in a given area may be unable to adapt to local or regional changes in climate. The ranges of diseases and insect pests that are limited by temperature may expand, if other environmental conditions are also favorable. In its summary report on the impacts of climate change, the Intergovernmental Panel on Climate Change stated, “(5)________ as a whole, the range of published evidence indicates that the net damage costs of climate change are likely to be significant and to increase over time.” 

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Before the mid-nineteenth century, people in the United States ate most foods only in season. Drying, smoking, and salting could preserve meat for a short time, but the availability of fresh meat, like that of fresh milk, was very limited; there was no way to prevent spoilage. But in 1810 a French inventor named Nicolas Appert developed the cooking-and-sealing process of canning. And in the 1850’s an American named Gail Borden developed a means of condensing and preserving milk. Canned goods and condensed milk became more common during the 1860’s, but supplies remained low because cans had to be made by hand. By 1880, however, inventors had fashioned stamping and soldering machines that mass- produced cans from tinplate. Suddenly all kinds of food could be preserved and bought at all times of the year. Other trends and inventions had also helped make it possible for Americans to vary their daily diets. Growing urban populations created demand that encouraged fruit and vegetable farmers to raise more produce. Railroad refrigerator cars enabled growers and meat packers to ship perishables great distances and to preserve them for longer periods. Thus, by the 1890’s, northern city dwellers could enjoy southern and western strawberries, grapes, and tomatoes, previously available for a month at most, for up to six months of the year. In addition, increased use of iceboxes enabled families to store perishables. An easy means of producing ice commercially had been invented in the 1870’s, and by 1900 the nation had more than two thousand commercial ice plants, most of which made home deliveries. The icebox became a fixture in most homes and remained so until the mechanized refrigerator replaced it in the 1920’s and 1930’s. Almost everyone now had a more diversified diet. Some people continued to eat mainly foods that were heavy in starches or carbohydrates, and not everyone could afford meat. Nevertheless, many families could take advantage of previously unavailable fruits, vegetables, and dairy products to achieve more varied fare.
3. The word “prevent” in paragraph 1 is closest in meaning to: 

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We all want to live in a clean and green world and breathe pollution free air. For this kind of environment we desperately need a fossil fuel free world. Scientists are toiling hard to come up (1)______ alternative fuels which can replace conventional fuels. One such study was presented at the 237th National Meeting of the American Chemical Society. This study throws interesting light on the first economical, eco-friendly process to (2)______ algae oil into biodiesel fuel. The scientists are quite hopeful that one day America will become independent (3)______ fossil fuels. Ben Wen is the (4)______ researcher and vice president of United Environment and Energy LLC, Horseheads, N.Y. According to him, “This is the first economical way to produce biodiesel from algae oil. It costs much less than conventional processes because you would need a much smaller factory, there (5)______ no water disposal costs, and the process is considerably faster.”

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Marriage is an ancient religious and legal practice celebrated around the world. However, wedding customs vary from country to country. The Wedding Dress: In many countries, it is customary for the bride to wear a white dress as a symbol of purity. The tradition of wearing a special white dress only for the wedding ceremony started around 150 years ago. Before that, most women could not afford to buy a dress that they would only wear once. Now, bridal dresses can be bought in a variety of styles. In some Asian countries and in the Middle East, colors of joy and happiness like red or orange other than white are worn by the bride or used as part of the wedding ceremony. The Wedding Rings: In many cultures, couples exchange rings, usually made of gold or silver and worn on the third finger of the left or right hand, during the marriage ceremony. The circular shape of the ring is symbolic of the couple’s eternal union. In Brazil, it is traditional to have the rings engraved with the bride’s name on the groom’s ring, an vice versa. Flowers: Flowers play an important role in most weddings. Roses are said to be the flowers of love, and because they usually bloom in June, this has become the most popular month for weddings in many countries. After the wedding ceremony, in many countries the bride throws her bouquet into a crowd of well-wishers – usually her single female friends. The person who catches this bouquet will be the next one to marry. Gifts: In Chinese cultures, wedding guests give gifts of money to the newly-weds in small red envelopes. Money is also an appropriate gift at Korean and Japanese wedding. In many Western countries, for example in the U.K, wedding guests give the bride and groom household items that they may need for their new home. In Russia, rather than receiving gifts, the bride and groom provide gifts to their guests instead. With the continued internationalization of the modern world, wedding customs that originated in one part of the world are crossing national boundaries and have been incorporated into marriage ceremonies in other countries. 
7. According to the passage, in which country would the wedding guests give the bride and groom money as a present?

Each sentence has a mistake. Findit by chosing A B C or D

A smile can be observed, described, and reliably indentify; it can also be elicited and manipulated under experimental conditions

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NASA is developing the capabilities needed to send humans to an asteroid by 2025 and Mars in the 2030s – goals outlined in the bipartisan NASA Authorization Act of 2010 and in the U.S. National Space Policy, also issued in 2010. Mars is a rich destination for scientific discovery and robotic and human exploration as we expand our presence into the solar system. Its formation and evolution are comparable to Earth, helping us learn more about our own planet’s history and future. Mars had conditions suitable for life in its past. Future exploration could uncover evidence of life, answering one of the fundamental mysteries of the cosmos: Does life exist beyond Earth? While robotic explorers have studied Mars for more than 40 years, NASA’s path for the human exploration of Mars begins in low-Earth orbit aboard the International Space Station. Astronauts on the orbiting laboratory are helping us prove many of the technologies and communications systems needed for human missions to deep space, including Mars. The space station also advances our understanding of how the body changes in space and how to protect astronaut health. Our next step is deep space, where NASA will send a robotic mission to capture and redirect an asteroid to orbit the moon. Astronauts aboard the Orion spacecraft will explore the asteroid in the 2020s, returning to Earth with samples. This experience in human spaceflight beyond low-Earth orbit will help NASA test new systems and capabilities, such as Solar Electric Propulsion, which we’ll need to send cargo as part of human missions to Mars. Beginning in FY 2018, NASA’s powerful Space Launch System rocket will enable these “proving ground” missions to test new capabilities. Human missions to Mars will rely on Orion and an evolved version of SLS that will be the most powerful launch vehicle ever flown. A fleet of robotic spacecraft and rovers already are on and around Mars, dramatically increasing our knowledge about the Red Planet and paving the way for future human explorers. The Mars Science Laboratory Curiosity Rover measured radiation on the way to Mars and is sending back radiation data from the surface. This data will help us plan how to protect the astronauts who will explore Mars. Future missions like the Mars 2020 rover, seeking signs of past life, also will demonstrate new technologies that could help astronauts survive on Mars. Engineers and scientists around the U.S. are working hard to develop the technologies astronauts will use to one day live and work on Mars, and safely return home from the next giant leap for humanity. NASA also is a leader in a Global Exploration Roadmap, working with international partners and the U.S. commercial space industry on a coordinated expansion of human presence into the solar system, with human missions to the surface of Mars as the driving goal.  
3. According to paragraph 2, what is one of the fundamental mysteries of the cosmos?