Unit 2 课文语法填空-高中英语牛津译林版（2020）选择性必修第三册.docx

Unit 2 课文语篇填空Life on a space stationLiving in space is every would-be astronaut's dream. My six-month stay on a space station has come to an end, and it has been 1. _ challenging but magical adventure. I bet you'd love to know what daily life is like up in space and how it differs from that on the Earththe low gravity definitely makes ordinary things strange!The strangeness of living in space is apparent from the moment we sleep. Due to the near 2. _ (absent) of gravity in space,we have to attach ourselves so that we don't float around. We usually sleep in private quarters, which are more like large cupboards, or in sleeping bags 3. _ (attach) to the walls or the ceiling. It's strange that we try to sleep with no pressure against our back, but the unusual beds don't bother us any more. After about eight hours of sleep, we start our day of work.The routine tasks that occupy most of the day are 4. _ (demand), but they can also be extremely rewarding. Our main mission is to conduct scientific research. We need to evaluate the effects of low gravity on animals and plants. Creatures such as mice, fish and mosquitoes have also been sent to the station! In a low-gravity environment, we can learn more about changes in cells and microorganisms under the microscope. As well as doing these biological experiments, we carry 5. _ experiments in other research fields. I have been working on one experiment which locates and tracks lightning over large regions of the Earth. Hopefully, it will cast new light on the Earth's climate and lead to better lightning protection. With so much going on, the space station needs a lot of maintenance, so we constantly check support systems and do some cleaning.The most challenging work takes place when we need to perform tasks outside the space station, such as testing new equipment, monitoring scientific experiments or repairing the space station. In the circumstances, it's time for a spacewalk. First, we put on our spacesuits, 6. _ allow us to breathe in space and protect us from exposure to the cold and radiation. Then we head out, and sometimes perform tasks for hours at a time, with the beautiful Earth visible below. Splendid as the view of the Earth is, spacewalking is not as exciting as you might think. It's probably the most dangerous work, with potential risks such as electric shocks. That's 7. _ every spacewalk is carefully planned.In view of the low-gravity environment, eating is also different in space. Most food is dried or freeze-dried. It's a luxury to eat fresh food, because fresh produce such as fruit and vegetables can only be delivered to the space station from the Earth every couple of months. Salt and pepper are only in liquid form, so that they will not float away and block the air pipes. However, liquids can't be easily controlled in space. We must drink water or any other liquids out of a bag through a thin tube of plastic. Furthermore, 8. _ (keep) our body healthy, we must ensure a balanced supply of nutrients by taking pills.Spending some time in the gym is of vital importance to astronauts' health. Did you know that in just five months, astronauts could lose a significant amount of muscle and bone mass? 9. _ (consider) these negative effects low gravity has on the human body, we discipline ourselves to do at least two hours of exercise every day. Exercise in space is not your average workout. We have to be tied onto specially designed exercise equipment to stop ourselves from floating around.During our leisure time, there's nothing we like more than to sit back with the rest of the crew and watch our remarkable planet go by, taking pictures for our family and friends back home. As the space station travels 10. _a speed of about 17,500 miles per hour, we get to see the sunrise every90 minutes. In these precious moments, all the challenges of life in space seem worth it.【答案】 1. a; 2. absence; 3. attached; 4. demanding; 5. out; 6. which; 7. why; 8. to keep; 9. Considering; 10. atWhy we exploreIn 1969, when Neil Armstrong first landed on the Moon, many people thought that soon we would be 1. _ (regular) visiting other planets in our solar system and would even dare to travel beyond it. This is clearly not the case. The reality is that space exploration is extremely difficult and dangerous, can take a very long time and 2. _ (cost) a huge amount of money. Some people believe that while space exploration expands our understanding of the universe, it is a waste of the public purse and does nothing to enhance the quality of our lives here on the Earth. Why do we continue to explore space, then?It is in our nature to explore. From the very early days of human life on the Earth, our curiosity about the unknown has kept us adventuring into new places. We long 3. _(visit) thick and wild forests, climb vast mountain ranges, and cross deep oceans. We desire to explore the furthest frontier of allspace. As Stephen Hawking once said, “Remember to look up at the stars and not down at your feet. Try to make sense of what you see and wonder about what makes the universe exist. Be curious.” 4. _ we are fascinated by the sky is evident in ancient tales from around the world, such as that of Chang'e. While space exploration is a reality, we remain curious about the mysteries of the universe. With each space mission comes greater insight, thus motivating us to continue along the same path of adventure.The results of these space investigations have made major contributions 5. _ an understanding of the origin, evolution, and likely future of the universe, such as planets, stars, and all other forms of matter and energy. Exploring space helps address fundamental questions about our place in the universe and the history of our solar system. It is through our research into space 6. _ we have confirmed that the Earth is round and that it orbits the Sun. As we learn more about the universe, we may one day answer the question whether there is life on other planets.With technologies first researched and developed for space exploration, we can solve some of the big problems 7. _ (face) mankind, making our lives safer and easier. One of these is earthquake shock absorbers. Shock absorbers originally applied to the space shuttle launch have also been set up in the cities with a high 8. _ (frequent) of earthquakes in order to protect buildings and save lives. Some technologies need further research to better solve real-life problems. For example, liquid hydrogen is a clean alternative energy source that is used widely as rocket fuel, and it is likely that hydrogen fuel cell vehicles will be mass-produced and launched in the near future. These scientific and technological advances can provide benefits to societies on the Earth in many areas including health, energy and information technology. This should be a strong motive for continuing to explore space.Although space exploration demands huge investment, the space industry can actually bring great economic value. It has been calculated that the global space economy is increasing by billions of dollars every year. At the same time, space exploration can provide a variety of career opportunities for young people. Jobs in the space industry go far beyond the astronauts that receive widespread media coverage. There are many support staff on the ground, such as engineers, 9. _ (mechanic) and research assistants.Moreover, the amazing work these people do can provide education and inspiration for the next generation. For me personally, this is by far the biggest reason for humanity to explore space. Such wonders as a space shuttle launch or astronauts walking on the Moon are incredibly exciting and inspiring to witness, and it can be these moments that shape children's lives forever and motivate them to become the scientists and engineers of the future. It is this kind of inspiration that keeps our thirst 10. _ knowledge alive and ensures that advances in space exploration and many other fields will continue to be made. When you have seen a man walk on the Moon, you grow up believing that anything is possible!【答案】 1. regularly; 2. costs; 3. to visit; 4. That; 5. to; 6. that; 7. facing; 8. frequency; 9. mechanics; 10. for学科网（北京）股份有限公司