牛津译林版九年级上册Unit 4 Growing up同步达标检测题

这是一份牛津译林版九年级上册Unit 4 Growing up同步达标检测题，共19页。试卷主要包含了短对话理解，长对话理解，短文理解，信息转换，单项选择，完形填空，补全对话，阅读理解等内容，欢迎下载使用。

Unit 4 达标测试卷
时间：120分钟　满分：120分
第一部分　听力(四大题，20分)
一、短对话理解(共5小题; 每小题1分, 满分5分)
1. For whom is dried food the most important thing?

2. What does the woman need to make herself heavier?

3. Where will people take their vacations in the future according to the woman?
A. In other countries. 　　　　
B. In space stations.
C. On the Moon.
4. What does the woman think of the pollution on the Earth?
A. Serious. B. Not bad. C. Good.
5. How long does it take Mars to circle around the Sun?
A. One Earth year. 　　　　
B. Two Earth years.
C. Three Earth years.
二、长对话理解(共5小题; 每小题1分, 满分5分)
听下面一段对话, 回答第6、7小题。
6. What is Jill reading?
A. A book about culture.
B. A book about history.
C. A book about the future.
7. What will the Earth be like?
A. Cities will be less crowded and polluted.
B. There will be more trees.
C. The Earth will be in great danger.
听下面一段对话, 回答第8至10小题。
8. Who is Mr Smith?
A. He's Miss Lin's friend. 　　
B. He's Miss Lin's teacher.
C. He's a science teacher.
9. What do Tom's classmates think of the life on Mars?
A. They think it's very interesting.
B. They find it a little boring.
C. They hope they could go to Mars.
10. Why does Tom want to borrow a VCD about the life on Mars?
A. Because he wants to travel to Mars.
B. Because his science teacher asked him to do so.
C. Because he wants to know more about the Moon.
三、短文理解(共5小题; 每小题1分, 满分5分)
11. How many people are talking about life in the future after school?
A. One. B. Two. C. Three.
12. How will everyone go to school according to(依照)Mike?
A. By train. B. By plane. C. By bike.
13. What does Gary think of the plane?
A. Comfortable. B. Expensive. C. Fast.
14. What does Zoe think of other people's ideas?
A. Boring. B. Good. C. Impossible.
15. Where will the students be on the last day of the month according to Zoe?
A. At school. B. At home. C. In the library.

四、信息转换(共5小题; 每小题1分, 满分5分)
The Science Museum
On the first
floor
Spend 16. ________ hour(s) in the labs trying everything you are interested in.
On the
second floor
See a special exhibition about how the car was invented and how it has 17. ________.
Have a chance to see all kinds of 18. ________ cars.
On the
third floor
Watch a film about space and space 19. ________.
Experience space travel by wearing 20. ________ designed glasses.
第二部分　英语知识运用(两大题，30分)
五、单项选择(共10小题; 每小题1分, 满分10分)
21. Stephen Hawking once said that man could make a spacecraft that could travel ____ a speed of nearly 300, 000 kilometres a second.
A. with B. on C. at D. for
22. —Andy practiced hardest among us and he won first prize in the competition.
—A dream can't come true ____ hard work.
A. by B. across
C. over D. without
23. About ____ of the students in our school ____ League members.
A. three fourths; is B. three fourth; is
C. third fourths; are D. three fourths; are
24. China is getting better at making hi­tech products ____ can be bought in all parts of the world.
A. who B. what
C. which D. where
25. （易错题）The speaker raised his voice, but still couldn't make himself____.
A. hear B. to hear
C. hearing D. heard
26. —What happened to the students?
—The heavy rain____ them ____ getting to school on time.
A. changed; into B. divided; into
C. prevented; from D. took; from
27. A survey about why teenagers like pop stars so much was ____ in our school last week.
A. carried out B. turned out
C. worked out D. taken out
28. （易错题）—The movie is wonderful. Do you feel like ____ it tonight?
—I'd love to, but my parents won't let me ____ out too late.
A. watching; to stay B. to watch; staying
C. watching; stay D. to watch; stay
29. —Do you get used to ____ out with friends on weekends?
—No, I prefer ____ at home and do nothing.
A. hang; staying B. hang; stay
C. hanging; to staying D. hanging; to stay
30. —____ Why didn't you watch the final of the football competition last night?
—I was discussing the history project with my friends at that time.
A. What a pity! B. Well done!
C. I agree. D. How exciting!
六、完形填空(共20小题; 每小题1分, 满分20分)
A
Last Wednesday, Mr. Chen took his class to the Space Museum. There __31__many things about space there. First, the children saw a film about space travel. They saw__32__the space shuttle took off and later landed on earth__33__. It was very exciting and the children felt they were traveling in space__34__！
After the film, Mr. Chen took__35__to see some models of rockets__36__ space shuttles. The models looked very real, but they were much__37__. Then the children saw some moon rocks. Two__38__landed on the moon in 1969. They put an American flag there. Then they took some rocks back to the__39__.
__40__the children left, they also watched a video show about people living and working in a space lab. The people could stay in the space lab for months.
31. A. is B. are C. was D. were
32. A. how B. what C. when D. which
33. A. too B. already C. again D. badly
34. A. itself B. ourselves C. oneself D. themselves
35. A. their B. them C. they D. theirs
36. A. or B. but C. and D. then
37. A. small B. smaller C. big D. bigger
38. A. Americans B. Englishmen
C. Australians D. Chinese
39. A. moon B. star C. earth D. sun
40. A. After B. As soon as C. Until D. Before
B（荣德原创）
The solar system is made up of the __41__ that orbit the sun. We have eight planets in the solar system. Planets in our solar system are very __42__ , but they all orbit around the sun.
The sun is a star, a huge ball of hot gas that gives__43__ heat and light. Mercury is the smallest planet in the solar system, and has a very barren __44__ covered with craters(陨石坑). It's very hot. Venus is the brightest and hottest planet in the solar system, and has a very hard rocky surface. __45__ is the planet which has life, and where we all live. Earth is the 5th largest planet in the solar system, and has a hard, rocky surface. Around 71 percent of the earth is covered with __46__. Mars is the second smallest planet in the solar system, and has a rough and dry surface. It's also called the red planet. Jupiter, the largest planet in the solar system, is called a gas giant planet, __47__ it's composed mostly of hydrogen and helium(氦气). Saturn is the second largest planet in the solar system, and has a beautiful giant __48__ of ice, dust and rocks. It is very cold. Uranus has 13 rings made of ice, dust and bits of rock. Neptune is the farthest from the sun. It gets its energy from its inner core.
For more than 70 years, Pluto was one of the __49__ planets in our solar system, but in 2006 it was reclassified as a dwarf planet by the international astronomical union, so we have a __50__ of eight planets now.
41. A. stars B. clouds C. rocks D. planets
42. A. different B. big
C. similar D. beautiful
43. A. off B. up C. away D. in
44. A. land B. surface C. plant D. dust
45. A. Mars B. Earth
C. Mercury D. Sun
46. A. water B. land C. air D. plants
47. A. so B. though
C. but D. because
48. A. ring B. circle C. light D. surface
49. A. nine B. eight C. seven D. ten
50. A. number B. size C. total D. height
第三部分　阅读理解(两大题, 45分)
七、补全对话(有两项多余)(共5小题; 每小题1分, 满分5分)
A：Would you like to live on Mars, Mary?
B：Why not? 51. ________ Robots would do all my work.
A：52. ________ Don't forget that you couldn't go outside.
B：I would write a robot story, and then sell the book to people on the Earth. 53. ________
A：Sounds interesting. 54. ________
B：It will cause a lot of trouble.
A：When having a robot is too much trouble, what can you do?
B：55. ________
A：I have to say it's a good idea. You are so imaginative.
B：That's true.
A. I think it would be exciting.
B. Then I will become rich and famous.
C. Yes, robots can do everything for me.
D. It would be too boring to live on Mars.
E. I can return it to the shop after I land on the Earth.
F. But if the robot catches a virus, what would happen?
G. What would you do all day if robots do all your work for you?
八、阅读理解(共20小题; 每小题2分, 满分40分)
A
Stephen Hawking, one of the world's most famous scientists, believed that humans will one day have to move into space. “Once we step into space, our future should be safe, ” he said.
Today, many countries are all planning to send astronauts to the Earth's closest neighbor：the Moon. Some of these countries want to create space stations there within the next 10 years. These stations will prepare humans to visit and later live on Mars or other earthlike planets.
__①__ Robert Zubrin, a rocket scientist, thinks humans should colonize(殖民) space. He wants to start with Mars. Why? He thinks sending people to Mars will allow us to learn a lot of things—for example, the ability of humans to live in a very different environment. Besides, any progress we make in the fields of science, technology, medicine. and health will do good to people here on the Earth.
__②__ Elon Musk, the CEO of Space X also believes we should colonize Mars. His long­term goal is to put one million people there if something bad happens to us here on the Earth.
__③__ Many people say it's too expensive. Also, most space trips are not short. A one­way trip to Mars, for example, would take at least six months. People traveling this kind of distance could face many health problems. Besides, these first people would find life especially difficult in space. On the Moon's surface, for example, the Sun's rays are very dangerous. People would have to stay indoors most of the time.
__④__ No matter what different concerns there are, sending people into space seems certain. In the future, we might see cities on the Moon or even new human cultures on other planets. First stop：the Moon.
56. According to the passage, why are some countries planning to build space stations?
A. To develop space travel.
B. To learn more about the Moon's surface.
C. To prepare humans to live on other planets.
D. To cut down the number of people living on the Earth.
57. Which is the best place for the sentence “Not everyone thinks sending humans into space is a smart idea. ”？
A. ① B. ② C. ③ D. ④
58. What is the purpose of this passage?
A. To give reasons for and against colonizing space.
B. To describe what life would be like on the Moon.
C. To compare the environments of Mars and the Moon.
D. To introduce progress in space science and technology.
B
When it comes to long­distance space travel, the biggest problem is that spaceships can only get as far as the fuel onboard allows. In 1964, a British writer Clarke came up with the idea of “solar sailing” in his science fiction. He wrote of large, mirror­like sails that collect power from the sun and free spaceships from the limitation of fuel.
This sci­fi idea was first successfully brought to reality(现实) in 2010 by Japan's IKAROS satellite. Ever since then, the technology has improved mission by mission, with the latest being NASA's Advanced Composite Solar Sail System (ACS3). NASA has recently announced that it's going to team up with Lithuania's satellite­building company NanoAvionics to test its new sail in low­Earth orbit.
To many, a solar sail(太阳帆) may look like a giant solar panel(太阳能电池板), but it actually works very differently. While solar panels take in energy from the sun and change it into power, solar sails use photons(光子) given off by the sun to create direct power. Besides, solar panels are big and heavy to carry, while solar sails are just the opposite.
According to Abbott, the CEO of NanoAvionics, the upcoming low­Earth orbit trial with NASA, if successful, will be followed with deep­space missions that involve larger solar sails. These are ideal for low­cost and long­distance space travel because fuel will no longer be a problem.
“It started as a sci­fi dream, ”Popular Mechanics reporter Jennifer Leman wrote. “Now it could be the future of space flights. ”
59. What can we say about solar sailing according to the first two paragraphs?
A. It was widely used in space travel.
B. It was first tried by IKAROS satellite.
C. It was from the creative idea by Clarke.
D. NASA will cooperate with Japan's satellite­building company to test its new sail.
60. Which of the following words best describe solar sails compared with solar panels?
A. Big and heavy.
B. Small and light.
C. Powerful and large.
D. Small but heavy.
61. What does the underlined word “These” in Paragraph 4 refer to?
A. Larger solar sails.
B. Deep­space missions.
C. Long­distance space flights.
D. Low­Earth orbit trials.

62. What is the best title for the text?
A. Solar Sail: the Latest Technology
B. Solar Sail: from Dream to Reality
C. Solar Sail: a New Kind of Spaceship
D. Solar Sail: a Sci­fi Dream
C
The first­ever photo of a black hole appeared on April 10, 2019. What can we learn from it?
First of all, black holes are huge stars with gravity(引力)so strong that even light cannot get out of their control.
As its name suggests, a black hole is black, so it'll be impossible to “see” against the black backdrop of space. But nearby objects, around the black hole where light can't get away—could be seen.
So the photo may show a dark point with a ring of bright light around. But that also might be a challenge, as the black hole is covered in a thick cloud of dust(灰尘) and gas.
As you might expect, this won't be the photo of the night sky from your smart phone. Photos will come from the Event Horizon Telescope(视界望远镜), a collection of telescopes around the world specifically(专门地)made to look at black holes.
The photo from the black hole may give us a better understanding of Albert Einstein's theory of general relativity(广义相对论), which he came up with in 1915. The shape of the black hole's event horizon could possibly cast new doubt (产生新的怀疑) upon it.
But even if it casts doubt, the finding would not necessarily mean that his theory is wrong, but we have more physics to understand.
63. What are black holes according to the passage?
A. Deep holes. B. Huge stars.
C. Black clouds. D. Strong lights.
64. Which of the following is TRUE according to the passage?
A. It is impossible for us to take a photo of the black hole with our smart phones.
B. The black hole is covered with a thin cloud of dust and gas.
C. Many scientists have taken the photos of the black hole so far.
D. People find it difficult to study the black hole and they will give up.
65. What is the main idea of the text above?
A. How to see the black hole.
B. Try to take a photo of the black hole.
C. The first coming photo of the black hole.
D. Something we will learn from the photo of the black hole.
D
Chinese space lover Wang Yuan has been chosen as one of the volunteers for the Mars­500 test project.
He was very happy to be chosen and will accept the challenge. Another five volunteers are all space lovers. They are three Russians, an Italy­Colombian and a Frenchman. They will feel what it's like to travel to Mars without leaving the Earth. During the whole process (过程), they are locked up for one and a half years under the condition which is similar to the red planet. So the experiment is called Mars­500.
The Mars­500 test will be done in a special building in Moscow. Although the volunteers won't leave the building, they will feel as if they are on a real trip to Mars. The most difficult thing is that they will be separated from the people outside. For 18 months, they won't see sunsets or sunrises. That will be hard. When reporters asked what they would miss most during the 500­day special life, Charles from France said, “For me, it will be mainly my family, the sun and fresh air. ”
The main task is to study “Man and the Environment”. It will care about the astronauts' physical effects and the experience of staying there. Everyone will stay and work there alone. So they will have to make decisions by themselves and then report to the Earth, and the Earth will tell them whether they do the right thing or not.
Each astronaut is preparing for the great challenge. And people are looking forward to the result of the experiment.
66. How many volunteers have been chosen for the Mars­500 test project?
A. 3. B. 4. C. 5. D. 6.
67. The main task of the test is to study ________.
A. whether there are aliens on Mars
B. if there is life on Mars
C. if Mars is suitable for humans to live on
D. the differences between the Earth and Mars
68. Which of the following is TRUE according to the passage?
A. Five space lovers have been chosen as volunteers.
B. The Mars­500 test will take place in Paris.
C. The Mars­500 test is about a real trip to Mars.
D. The volunteers will face many difficulties.
E
Many people dream of traveling into outer space. However, spending too much time in space may cause health problems, according to NASA. That's why astronauts shouldn't spend more than six months on the International Space Station(ISS)at a time.
Muscle(肌肉)and bone loss
In a weightless environment, astronauts don't need to use their muscles to support themselves, so their muscles start shrinking. To keep their muscles strong, astronauts need to exercise about 2 hours each day on the ISS.
Sleep disorder(混乱)
In space, the sun rises every 90 minutes. It is hard for astronauts to get used to this light­dark cycle when they sleep. Also, they need to sleep in a sleeping bag that is fixed to a wall, and it is uncomfortable.
Astronauts now have individual sleeping pods(分离舱)that help shut out some of the light. Still, studies have found that most astronauts only sleep about six hours each night, even though they should have eight and a half hours.
Brain changes
Scientists have found that the position of the brain changes during space flights. It can affect how the brain deals with how we see, stay balanced and move around. That's why some astronauts can't control their movement and balance after returning to the Earth. Scientists have also found that astronauts may get used to this change after going on more space flights. But they still need to do more research.
69. According to the passage, astronauts may have the following health problems EXCEPT ________.
A. bone loss
B. brain changes
C. sleep disorder
D. headache
70. Astronauts may have muscle problems after returning to the Earth because______.
A. they seldom walk while in space
B. they are too busy to exercise in space
C. they don't have enough room to exercise in space
D. they don't need to use their muscles to support themselves in space
71. Astronauts sleep in individual sleeping pods to ________.
A. stay warm at night B. shut out light
C. enjoy a quiet place D. avoid moving around
72. The best title of this passage is ________.
A. Sleep Disorder in Space
B. Brain Changes in Space
C. Muscle and Bone Loss in Space
D. Health Problems in Space
阅读下面的短文, 并用英语回答问题(请注意每小题后面的词数要求)。
F
The sun is always shining. But it can only shine on one side of the Earth at one time. When the Sun is shining on one side of the Earth, it is night on the other side. At night, you can see the stars. The stars are in the sky all day. But the light from the sun is so bright that you can't see them. When night comes, there is no light, and the stars are bright enough to see. The stars look very small. But some of them are even bigger than the Sun. They look small because they are so far away from you. Big things look much smaller when they are far away. The Sun is closer(近)to the Earth than the stars, so it looks bigger.
73. When are the stars bright enough to see？(不超过5个词)
_________________________________________________________________
74. How do big things look when they are far away？(不超过5个词)
_________________________________________________________________
75. Why does the Sun look bigger than the stars？(不超过10个词)
_________________________________________________________________
第四部分　写(两大题，25分)
九、单词拼写(共5小题; 每小题1分, 满分5分)
76. P (被污染的) air does harm to our health. It's necessary to keep air fresh and clean.
77. They have reached an a (一致, 协议) that students should be given more free time to take up a hobby.
78. More and more p (乘客) would like to take the underground instead of taking buses.
79. We must accept the p (可能性) that we are wrong.
80. With the r (快速的)development of science and technology, our life is becoming better and better.
十、书面表达(共1小题; 20分)
发挥你的想象, 我们如何才能在火星上居住呢？在火星上生活有什么不同？根据以下提示完成一篇80词左右的短文：
1. 交通工具是航天飞机, 其速度达到光速的一半;
2. 科学家开发出了能产生食物、氧气和水的植物;
3. 人们通过穿特制的靴子来解决火星上重力的问题;
4. 在火星上人们有更多的空间和更多的空余时间;
5. 在火星上, 学生可以在家里通过星际网络学习;
6. 在火星上食物没有地球上的美味, 而且火星之旅将可能是令人不舒服的。
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参考答案
第一部分　听力
听力材料：
一、1. M：What do you think is the most important thing for an astronaut?
W：I think dried food is the most important.
2. M：The gravity on Mars is only about 3/8 of that on the Earth. You can jump high easily.
W：Oh, it's too dangerous. I need the special boots to make myself heavier.
3. M：Alice，what's your prediction about the future?
W：Well，I think we'll study at home on computers. We'll take long vacations on the Moon.
4. M：What do you think of moving to another planet in the future?
W：It sounds like a good idea，because the pollution on the Earth is very serious.
5. M：How far is it from Mars to the Sun?
W：About 227，940，000 km. It takes Mars about two Earth years to circle around the Sun once.
二、Text 1
Nick：What are you reading，Jill?
Jill：A book about the future.
Nick：Sounds cool. So what will the future be like?
Jill：Well，cities will be more crowded and polluted. There will be fewer trees and the environment will be in great danger.
Nick：That sounds bad！Will we have to move to other planets?
Jill：Maybe. But I want to live on the Earth.
Nick：Me，too. Then what can we do?
Jill：We can use less water and plant more trees. Everyone should play a part in saving the Earth.
Text 2
M：Excuse me，Miss Lin. Have you got any VCDs about the life on Mars?
W：Yes，Tom. I've got some.
M：That's great. Could I borrow one，please?
W：Of course you can. Why do you need it?
M：The science teacher Mr Smith asked us to read books or watch VCDs to know more about Mars. He said that you had some.
W：Are you interested in the life on Mars?
M：Yes，and so are my classmates.
W：Oh，I see. Here it is. I hope it can be helpful to you.
三、　　Mike，Gary and Zoe are talking about life in the future after school. Mike thinks in the future everyone will have a plane to go to school. Then no one will be late for school. Gary thinks it's a good idea. But he thinks a plane is very expensive. Mike and Zoe think maybe in the future a plane will be very easy to buy and it will be very cheap. Gary thinks in the future there will be many trains for students to take. They will just take students from home to their schools. Zoe says their ideas are both good, but she thinks in the future students will only study at home. Only on the last day of the month, they need to go to school to have a big party with their teachers.
四、　　Good morning，boys and girls！Here we are at the Science Museum. I'm Linda and I'll show you around today. On the first floor there are three laboratories. You will spend one hour here and try everything you are interested in. Then，we will go to the second floor. There you can see a special exhibition about how the car was invented and how it has developed. You will have a chance to see all kinds of model cars. On the third floor you will watch a film about space and space travel. You can experience space travel by wearing specially designed glasses.
I hope you will have a good time today.
听力答案：
一、1～5：AACAB
二、6～10：CCCAB
三、11～15：CBBBA
四、16. one/ 1　17. developed　18. model 19. travel　20. specially
第二部分　英语知识运用
五、21. C　点拨：at a speed of以……速度。
22. D
23. D　点拨：句意：我们学校大约有四分之三的学生是共青团员。“四分之三”的英语表达为three fourths; students是可数名词复数，故谓语动词用are。故选D。
24. C
25. D　点拨：根据 The speaker raised his voice, but still couldn't make himself ________. 可知句子考查过去分词作宾语补足语：make ＋宾语＋宾语补足语， himself 和 hear 是被动关系，用过去分词作宾语补足语。
26. C　点拨：考查prevent sb. from doing sth. 阻止某人做某事。
27. A　28. C　29. D　30. A
六、(A)31. D　点拨：此题考查there be句型，由空白处后的many things可知be用复数，再由全文时态可知选D。
32. A　点拨：由题意“他们看到航天飞机是怎么起飞，然后又怎么落在地球上的”可知选A。
33. C
34. D　点拨：由the children可知选D。
35. B　点拨：由语境可知应选them，指的是孩子们。
36. C　点拨：此处应用and表示并列关系。
37. B　点拨：模型应该看起来很真，但比实物要小。
38. A　点拨：由后面的American flag可知选A。
39. C　点拨：他们应是把一些岩石带回地球。
40. D　点拨： before“在……之前”。
(B)41～45：DAABB　46～50：ADAAC
第三部分　阅读理解
七、51～55：AGBFE
八、(A)56. C　点拨：根据短文第二段“Some of these countries want to create space stations there within the next 10 years. These stations will prepare humans to visit and later live on Mars or other earthlike planets. ”可知，一些国家希望在月球建立空间站，为人类访问和以后居住在火星或其他行星做好准备。故选C。
57. C　点拨：题干意为“‘不是每个人都认为把人类送入太空是一个明智的想法。'这个句子最好放在哪里？”根据句意可知，这是反对人类访问太空这一做法的，短文第五段“Many people say it's too expensive. …People traveling this kind of distance could face many health problems. Besides, these first people would find life especially difficult in space. ”很多人觉得这样做很贵、可能有健康问题以及太空生活可能很困难等，都是反对的观点，故选C。
58. A　点拨：根据文意可知，短文第一、二段先陈述了很多国家都想访问太空这一事实，第三、四、五三段列举了不同科学家对此的观点，最后一段是总结。A选项“给出支持和反对太空移民的理由”符合文意，故选A。
(B)59. C　点拨：根据原文 In 1964, a British writer Clarke came up with the idea of “ solar sailing ” in his science fiction. 可知，“太阳风帆”概念是由英国作家克拉克提出来的。C选项 It was from the creative idea by Clarke. “这是来自克拉克的创意”符合题意，故选C。
60. B　点拨：根据原文Besides, solar panels are big and heavy to carry, while solar sails are just the opposite. 可知，与太阳能电池板相比，太阳风帆又小又轻。 B选项Small and light. “又小又轻”符合题意，故选B。
61. A　点拨：根据原文…if successful, will be followed with deep­space missions that involve larger solar sails. These are ideal for low­cost and long­distance space travel because fuel will no longer be a problem. 可知，此处These指的是前面提到的更大的太阳风帆。A选项Larger solar sails. “更大的太阳风帆”符合题意，故选A。
62. B　点拨：通读本文最后一段内容 It started as a sci­fi dream 和 Now it could be the future of space flights可知，本文主要说的是“太阳风帆”从概念走向现实的过程。B选项Solar Sail：from Dream to Reality “太阳风帆：从梦想到现实”符合题意，故选B。
(C)63～65：BAD
(D)66～68：DCD
(E)69～72：DDBD
(F)73. When night comes.
74. They look much smaller.
75. Because it's closer to the Earth than the stars.
第四部分　写
九、76. Polluted　77. agreement　78. passengers
79. possibility　80. rapid
十、 Life on Mars
In the future, we can travel to Mars by space shuttle which travels at half the speed of light. We can live on Mars because scientists develop plants that can grow on Mars and can produce food, oxygen and water. The gravity on Mars is only three­eighths of the gravity on the Earth, so we should wear special boots to make ourselves heavier.
On Mars, we will have more space and more free time, so we can live in a home with many bedrooms and have more time for hobbies. Students on Mars can study at home on the interplanetary computer network.
But the food on Mars will not be as tasty as that on the Earth, and the journey to Mars will probably be very uncomfortable.