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    Terrafugia Inc .said Monday that its new flying car has completed its first flight,bringing the company closer to its goal of selling the flying car within the next year.The vehicle-named the Transition – has two seats，four wheels and wings that fold up so it can be driven like a car.The Transition,which flew at 1,400 feet for eight minutes last month, can reach around 70 miles per hour on the road and 115 in the flies using a 23-gallon tank of gas and burns 5 gallons per hour in the air. On the ground, it gets 35 miles per gallon.

    Around 100 people have already put down a $10,000 deposit to get a Transition when they go on sale, and those numbers will likely rise after Terrafugia introduces the Transition to the public later this week at the New York Auto Show. But don't  expect it to show up in too many driveways. It's expected to cost $279,000.And it won't  help if you're stuck in traffic. The car needs a runway.

    Inventors have been trying to make flying cars since the 1930s, according to Robert Mann, an airline industry expert. But Mann thinks Terrafugia has come closer than anyone to making the flying car a reality. The govemment has already permitted the company to use special materials to make it easier for the vehicle to fly. The Transition  is now going through crash tests to make sure it meets federal safety standards.

    Mann said Terrafugia was helped by the Federal Aviation Administration's decision five years ago to create a separate set of standards for light sport aircraft, which are lower than those for pilots of larger planes. Terrafugia says an owner would need to pass a test and complete 20 hours of flying time to be able to fly the Transition,a requirement pilots would find relatively easy to meet.

    {#blank#}1{#/blank#} If you are growing tomatoes in your backyard for sale you are producing for the market. You might sell some to your neighbor and some to the local manager of the supermarket. But in either case, you are producing for the market. {#blank#}2{#/blank#} If people stop buying tomatoes, you will stop producing them.

    If you take care of a sick person to earn money, you are producing for the market. If your father is a steel worker or a truck driver or a doctor or a grocer, he is producing goods or service for the market.

    {#blank#}3{#/blank#} You may spend money in stores, supermarkets, gas stations and restaurants. Still you are buying from the market. When the local grocer hires you to drive the delivery truck, he is buying your labor in the labor market.

    {#blank#}4{#/blank#} But for each person or business that is making and selling something, it is very concrete(具体的). If nobody buys your tomatoes, it won't be long before you get the message. {#blank#}5{#/blank#} It is telling you that you are using energies and resources in doing something the market doesn't want you to do.

    The human beings seem to be facing a crisis （危机）． After Our best Go players were defeated one by one by the artificial intelligence (AI) AlphaGo, we lost our pride of being at the top of the intelligence chain. And in October，when Saudi Arabia gave citizenship to a robot named Sophia, another privilege of being human was take away．It looks like everything that separates humans and AI is at risk fight now．

    But we keep hoping that instead of “everything ”, there's still something left in us that makes us irreplaceable.

    To Hao Jingfang, winner of the 2016 Hugo Award for Best Novelette, that “something” is our consciousness. “AlphaGo is intelligent in a certain way, but not intelligent enough to ask the important questions – Do I like playing Co? Do I want to play Go today? Why do I have to play Go when you tell me to?” she once said．In other words, computer programs don't have a choice to say “no”． They probably don't even know what a “choice” is – all they ever do is calculate．

    And to He Huaihong，a philosophy (哲学) professor at Peking University，imagination and creativity are also what make us special. A machine couldn't have come up with the theory of gravity just because it was hit by a falling apple，he said．It's human imagination that connects what seem to be completely random and irrelevant concepts，something that a machine—which works by fixed rules only—can't do，at least for now．

    This is why BBC reporter Viktor Mayer-Schonberger suggested that instead of focusing on how computers have overshadowed us on calculating abilities than humans，we should probably “consider our quality at a different end of the spectrum (光谱)：creativity，originality (原创性)，even plain illogical craziness，instead of hard-nosed (顽固的) logic”，he wrote．

    So maybe in the future，as artificial intelligence becomes even more intelligent，humans and A1 will learn to use each other's talents for good．If AI can handle the boring tasks like calculating and driving for us，we'll have more time to create，think，and be busy with “being human”．

    Last month, the president of the Maldives, Mohamed Nasheed, held an underwater meeting. The purpose of the ocean floor conference is to highlight the effects of global warming on his island nation.

    The Maldives, located in the Indian Ocean, is the lowest-lying country on Earth. Melting glaciers and polar ice are causing sea levels to rise, putting the Maldives and other low-lying areas at risk of being swallowed by the sea within the next 100 years.

    What can be done? Scientists and leaders from 190 nations will try to figure that out at the United Nations climate change conference next month. The main goal of the meeting is to come up with a new climate agreement for 2012 and beyond. That is when the existing plan, the Kyoto Protocol will expire. The agreement was created in Kyoto, Japan, in 1997. Since then, it has been ratified(正式批准) by 190 nations. The countries promised to limit the amount of greenhouse gases, such as carbon dioxide, which they produced each year.

    The debate over who should cut greenhouse emissions has been going on for years. The US has been hesitant to reduce emissions unless fast-growing nations such as China and India also reduce their use of fossil fuels. In recent months, China has taken steps to be greener. But India has been unwilling to change. It argues that it is unfair for rich nations to ask poorer countries to cut down on emissions.

    While world leaders work on a plan in Copenhagen, there are many things you can do to help the planet. You can save fuel by walking or biking instead of riding in a car. You can start a recycling program in your community. You can plant trees. Trees absorb carbon dioxide from the air and give off oxygen.

    These days, it seems like everyone wants to go out into space and live on new planets. Rather than depend on another pre-existing planet, could we make a new, proper planet ourselves?

    To start with, if we do want to be living on it, we should find a good place in space to put the new planet. We'd want it to be in a habitable zone, meaning the planet should be at the right distance from its star to make sure there would be perfect temperatures and most importantly, liquid (液态的) water.

    We'd also need the right materials to make the planet. Our Earth is made up of many different elements (元素). If we made our own new planet we'd probably want it to have similar elements and a similar structure (结构). We'd also want enough water to form some oceans.

    But even if we get all of the materials creating a new planet like Earth could have many troubles. It might be something more like a huge space station. It would be pretty expensive if we wanted it to be super big.

    We would probably also need a lot of food since there's going to be many scientists and astronauts out in space working on this project!

    According to NASA, each astronaut uses about 0. 83 kilograms of food per meal, including 0.12 kilograms of packaging (包装) material. Without the weight of the packaging material, we'd need about 780 kilograms of food just to feed one astronaut for a year.

    Putting all these together could make it possible to make our own planet one day! In reality, creating a new planet would probably require a very modern technology and there would be tons of other things to think about. And if this is even possible, it likely won't happen for a very long time.

World War Ⅱ lasted from 1939 to 1945.Life changed for everybody,including women and children because of the war.Millions of people lost their lives during the war.The Diary of a Young Girl was a record of that time.The book was written by a girl named Anne Frank.

Anne Frank was born in Germany in June 1929.Because the German Nazis hated the Jews and warned to kill them,her family had to move to another country.In July 1942,they went into hiding in a secret place in her father's office.During that difficult time,Anne kept writing diaries until she and her family were discovered by the Nazis in August 1944.They were caught and sent to a Nazi camp.The next year,her mother died.In the same year,she and her elder sister died of illness,before the war ended.

After the war,her father collected her diaries and the book The Diary of a Young Girl came out in 1947.It has been put into over 30 languages since then.The book has been read by people all over the world.In her diary,Anne wrote down her thoughts,her feelings,her hopes and her dreams for the future,"I want this diary itself to be my friend,and I shall call my friend Kitty." "I can't spend all day complaining because it's impossible to have any fun!...Every day,I feel the beauty of nature and the goodness of the people around me.With all that,why should I be sad?"

The Diary of a Young Girl has also become a symbol of the greatness of the human spirit.It is called one of the wisest and most moving records on war.