In case we couldn't live on Earth one day, scientists put     1    Plan B that we will explore Mars to see if we could live on it. Mars     2    (fascinate) people since ancient times. Films     3    (relate) to Martian exploration have been made. Governments and     4    (organisation) are educating the public on the Red Planet. Besides, we have been sending unmanned spacecraft to Mars. But,     5    (send) people there will require all the skill, courage and intelligence of the human race. According to the Biosphere 2 experiment, although people     6    (stay) alive on Mars is not impossible, human settlement of Mars is still     7    (decade) away. Now, human activity causes our planet to get     8    (warm) and warmer,     9    has a terrible effect on the biosphere. Before we find another planet to live     10    , we need to take much better care of the only planet we have.

3D printing and virtual reality are cool, but when are we going to be able to clone ourselves? It'd be fantastic for    1    （we）to send our clone off to school or work and sit back and do    2    we really want to do. There have been important advances in cloning in the last several decades, leading to the    3    （success）cloning of various animals. So far, however, there    4    （be）no human clones.

In large part, cloning has been    5    victim of pop culture to the degree that the general public has grand notions of what it will be like. There is no    6    （possible）of cloning a grown version of ourselves in a matter of hours or days（like you see in the movies）.

    7    （general）, we already have the tools to make cloning happen today; we just have some moral problems     8    （overcome）before the world won't raise major alarms at scientists cloning someone. That leaves the question     9    us then, the general public, do you think cloning is okay? Would you clone a lost loved one to bring them back, or if you found yourself unable to have kids, would you clone yourself? These are the questions we must answer first before we succeed in    10    （create） human clones.

Life on Mars

Some people believe humans could live on the planet Mars by the year 2100. Our own planet, the Earth, is becoming more and more crowded and polluted because of the rapid increase in population.     1    (hopeful), people could start all over again and build     2     better world on Mars. Here is what life there could be like. At present, our spacecraft are very slow—it would take     3    (month). With the development of technology, the journey might only take about 20 minutes by 2100 in spacecraft     4     travel at the speed of light!     5    , the spacecraft would travel so fast that the journey might be quite     6     (comfort). Many people would feel ill. Humans cannot survive     7     water, oxygen or food. Nobody knows     8     there would be enough water or oxygen on Mars for people there. Gravity could be another problem. The gravity on Mars     9    (be) only about three-eighths of that on the Earth. People would have to wear boots that are specially designed to prevent     10     from floating off into space. Life on Mars would be interesting as well as challenging.

As the development of science and technology sped up, people had a much     1       （wide）range of places for their travels. They began to feel bored with the     2     （attraction）on the earth. Going to the space station became     3     dream of many people. Zhang Qiang was no exception. After taking up the prize he     4     （win）the year before, he was taken into the future in a time capsule.     5     （immediate）he arrived there, he was amazed at     6     the future looked like. Luckily, it was under the     7     （direct）that he became familiar with the new surroundings in space in no time. Having been shown around a strange-looking house, he was then guided to a space station consisting     8     three parts. Inside the space station were the most up-to-date inventions of the 3l st century. In addition, there was a system where the waste was dealt with by     9     （use）the theory of ecology（生态学理论）. Though troubled by lacking oxygen, Zhang Qiang was     10     （satisfy）with his journey and optimistic about the future.

Who is smarter？A human being or artificial intelligence？The question     1    （sweep）across the world when a Google-developed program called AlphaGo defeated the world top player. So，what comes next？

Some people are pessimistic，saying that the full development of artificial intelligence，    2     AI in short，could mean the end of the human race. So are we really about to live in the world     3    （show）in the Terminator（终结者）movies？

“Not quite，”answered John Markoff of The New York Times，    4     is optimistic about the future. “We think that，for the human beings，things like sight and balance，    5    （be）natural and ordinary in our life. Also，we humans are better at making     6    （adjust）to the surroundings. We have a long way to go before AI can     7    （true）begin to be similar to the human brain，even though the technology can be great.” Meanwhile，John Markoff said that researchers should build artificial intelligence to make people more     8    （effect）.

“Our fate（命运）is     9     our own hands，”he added.“Since technology depends on the values of     10     (it) creators, we can choose to use technology to improve the world.”

Over the centuries, there have been a few people who plan the future of the world for a living and they     1     (call) futurologists.

Hundreds of futurologists will gather at Newcastle University to hold a seminar about the future. Many people will attend the seminar with dreams of starting new enterprises     2     (base) on the predictions they will hear. I clicked     3     the websites of a few futurologists and got several predictions.

    4     (short), computers will become handier. Then all of us can use our voices to control computers such as downloading files     5     updating computers just by saying a few words. By 2015, garments will have been made of new materials that will remain stainless     6     you spill on them, and they will never get old and worn. By 2025, there will have been no     7     (starve), no people who have to live on welfare, no discrimination, no conflict and people     8     (live) in peace and equality. By 2030, tiny, insect-like robots may be sent around the cells of our bodies     9     (assess) our health , which will have made it possible for us to live for at least 150 years. By 2050, we will be linking our brains to the much     10     (smart) computers and a huge database₉ and a new type of electronic human might have developed!

What will cars be like in the future? Maybe we can sit in a car that can drive all by     1     （it） in a few years’ time. In fact, with the rapid development of modern science and technology, the self-driving car is becoming a     2    （real） on busy streets.

According to a report by Google, the world-famous search engine, its self-driving cars     3    （travel） more than 700,000 miles on roads in California so far. The first self-driving car     4    （make） by Google came out in 2009. There are cameras on the top of the car,     5     allow the computer in the car to draw a 3-D map of the surroundings. In addition, Google says that its self-driving cars can discover hundreds of separate     6    （object）at the same time, which might be an improvement on the human driver experience. As     7     result, there will be far     8    （few） traffic accidents caused by careless driving.

However, self-driving cars are much too     9    （expense） right now. Scientists across the world are doing their best to bring down the costs,     10     hundreds of thousands of dollars to the cost that most people can afford.

The Future Life on Mars

Compared with the life we    1    (live) on the earth now, the future life on Mars will be     2    (total) different.

Firstly, without pollution on Mars, people will be able to drink cleaner water    3     breathe fresher air, so they will be    4    (health).The food on Mars will be different from     5    food now. People will just take    6    (pill) and drink man-made juice instead of eating bread and meat. Secondly, people will travel back to the earth or to other planets for sightseeing by spaceship. Additionally, there will be no    7    (fix) school and classrooms. Children will just fly to    8    classroom    9     the school spaceships. And people won’t work in factories or companies. They can stay at home,    10    ( work) with computers.

The Chang’e 4 spacecraft landed on the so-called dark side of the moon at 10:26 am on Thursday, brought the country    1    (close)to its goal of becoming a space power. Chang’e 4 sent a picture    2    ( take) at 11:40 am back to Earth. It shows that the moon’s far side is not    3    (absolute) dark. But it is often called the dark side because it faces away from Earth and little    4    (know) about it. In fact,the far side of the moon is a rather quiet place that is free from disturbance from radio    5    (signal) from the Earth.

Hou Xiyun is a professor at Nanjing University’s school of astronomy and space science,     6    told the Associated Press,   “    7    the whole, China’s space technology still lags behind the West,with the landing on the far side of the moon, we have raced to the front.”

He added，”The landing is    8    example of China’s growing desire     9    (strengthen) its position as an international power.

China plans to explore Mars, Jupiter and asteroids in the future.”

There’s no doubt that our nation will go farther and farther.

It’s hoped     10     our space dream to make China stronger will come true soon.