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1、Passage 1Billionsof dollarshave alreadybeen spent inplanninghow to set foot onMars. So why do we want to go there so badly?Dutch organization Mars One wants to put people on Mars by 2027. The researchers say it is just the next step in human curiosity（好奇心） . “Why didColumbus travel west? Why did Mar
2、co Polo head east? ” their website says. Mars One also thinks Mars exploration will improve the development of recycling, solar energy（ 太阳能）, food production and even medical technology.探测器 ） to theBillionaire businessman Elon Musk runs a company in the United States. Its name is Space X. Musk, who
3、was born in South Africa but is now a US-Canadian citizen, agrees that curiosity plays a part. But his main reason for going to Mars is the survival（ 生存 ） of the human race. To survive,we must learn to live somewhere other than Earth.In 2011, along with Russia, China planned to send a probe（ planet.
4、Another probe will reach Mars by 2021.US space agency NASA is also excited to get to Mars. will find evidence（证据） of life, answering one of the biggest“Future exploration mysteries of theuniverse（ 宇宙）: Does life exist beyond Earth?the NASA website says. Accordingto it, Mars and Earth have lots of th
5、ings alike. Exploring Mars also helps us learn more abo ut our own planet s history and future.A. Japanese also hopes to do a project on Mars.B. Well, different organizations have different reasons.C. Its final goal is to help humans live on other planets.D. China has a long period dream of reaching
6、 Mars one day.may be new species on Mars which can surprise us a lot.F. And NASA thinks it helps humans learn more about the universe.G. Because that adventure makes humans find new places to explore.Passage 2An international freight railway network （货运铁路网 ） is connecting China tocities across Europ
7、e. 2,000 years ago, it took a year to get goods from China to Europe along the ancient silk road. But today, goods from China can reach London by rail in just 14 days. It takes less time than before.Yiwu is a city that is located in Chinas Zhejiang Province. In Yiwu, it oncetook two hours by the roa
8、d to send European goods to the nearest seaport（海港 ）.But today, a new freight rail link connects Yiwu to Europe along an ancient trade route.Yiwu railway station is a big freight station now. Its part of the multi-billion-US-dollar Belt and Road Initiative （倡 议 ）. It is set upin order todevelop the
9、international trade.It spreads across 13,000 kilometers through France, Germany, Poland, Belarus, Russia and Kazakhstan. Along the way, the train transfers （ 换 乘 ） three times because of different track gauges （ 轨距规） in China, Europe and Russia.With transfers only taking 1 minute per container （ 集装箱
10、 ）, the rail link cut Europe-China transportation time by half. Now foreign products are easier and cheaper to buy for Chinese.A. Silk Railroad is very important.B. It is called as the new“Silk RailroadC. It will take a long time to travel to Yiwu City.D. Then it took a two-month journey across the
11、oceans.E. It began to transport goods overland to Europe in 2014.F. And it only takes people three weeks to get goods from Europe.G. The Yiwu-Madrid railway is the longest rail link in the whole world.Passage 3In many big cities in the world, many people think the overuse of cars is oneof the main c
12、auses of air pollution. Cars in the future must be environmentfriendly.Some experts think that today s cars are in trouble because they use too much petrol（ 汽油 ）. The car of tomorrow will be made without air conditioning.The tomorrow s car will be very small, so that only takes up very little room.I
13、t needn t have a pollution control system because it wont use petrol. Veryfew people will be killed inaccidents because the top speed will be very low.However, we are also warned not to ask for prettycolors because the cars willcome in grey only.They are sure that people will be happier in the futur
14、e. They think that allour problems will soon be solved by car companies with the production of the supercar（ 超级汽车 ）.5. The supercar will have four rooms, TVs, running water, heat, air conditioning and maybe a swimming pool. Large families will travel on long trips comfortably. The supercar will notp
15、ollute the environment because they will run on water.A. What s the problem?B. What will cars be like in the future?C. Other car experts do not hold the same idea.D. I think the car on the future will be more useful.E. In fact, this car will be pushed by clean energy.F. They say the car of the futur
16、e will be much smaller.G. Tomorrows cars will be smaller, faster, and more comfortable.Passage 4Smart wristband（ 智 能 手 环 ）, a new welcoming product, is changing our lifestyle. Having a smart electronics gadget （ 小 装 置 ） on your hand can really make huge differences. So from now on it will be a great fun to maintain your health in a more
