5G is developing, but most of us aren't really sure what it is or the reason     1     we need it. A big part of the reason is that 5G means more than one thing. If you ask different people, you     2    (provide) with different answers.

Experts believe that 4G is on     3     way out. In 2020, the U.K. is expected to use 5G. At present, it is unknown exactly what influence 5G will have on people's life but it is widely thought that 5G will     4     (definite) be faster than any generation of networks we have used previously.

Work will likely become much easier as 5G will allow quicker downloads and a better ability to work online even if there is no wi-fi connection. With the     5     (develop) of 5G, driverless cars will be able to communicate     6     other vehicles, which can reduce road accidents by about 10%, One of the most     7     (impress) things will be that people can see which seats on a train are accessible to     8     (they) when it arrives at the station.     9     (get) around the world will also be more convenient.

A number of     10     (company) are now working on bringing 5G to the market. It remains to be seen how much of the country 5G will cover and whether everyone will be able to benefit from it.

When I was in junior high, I was study machine. But I was will to do so because I understood how vital study was. I gave out all my rest time including summer and winter vacation with all weekends, that was highly odd and extreme in other’s eyes. Those years our motherland was still advanced, giving the cruel fact that Chinese GDP only surpassed that those of Japan. I studied so hard like a maniac China’s first premier Zhou Enlai did.

8 . Fabien Cousteau is the grandson of Jacques Cousteau, an ocean scientist who brought the wonders of the sea to the attention of people around the world. Jacques Cousteau helped invent the Aqua-Lung(水肺) , now used by divers everywhere. Fabien Cousteau has followed a similar path,exploring the sea as a scientist and working to protect the oceans.

Oceans cover more than 70% of our planet. NOAA says we have created maps of less than 20% of the world's oceans, and only 5% have been explored. Space seems to have gotten much more attention , even though it's farther away. The International Space Station( ISS) has been around for more than 20 years , and more people have gone to the moon than have gone to the deepest point in the ocean.

"The ocean is our life support system. It is the very reason why we exist in the first place,'Fabien says.

But though the ocean is all around us , studying it is a challenge. Divers are limited in how far down they can go and how long they can stay below. Returning to the surface can be dangerous. Fabien has announced a plan to build a large research station under the ocean named Proteus,which is designed to deal with many of those problems. The power for the station is expected to come from solar energy and the movement of the ocean. Fabien says that the research base won't just be used to study and help protect the sea, but also to research new ways of creating energy , and perhaps even searching for new medicines. Proteus is also expected to have the first under water greenhouse in the world , so that the lab will be able to grow some of its own food.

Like the ISS , Proteus is designed so that it can grow in the future , as scientists decide to add new sections or equipment to the station. Fabien hopes to have the lab completed and ready to use by 2023.

9 . Self-driving cars are so popular that the University of Michigan has even established a town called Mcity to allow car manufacturers to safely test their autonomous cars.

While Mcity can be used to simulate（模拟）many real-life road conditions，it can't help test gestures drivers use to communicate their intention（意图）to other drivers，pedestrians or cyclists. To find a solution，US car manufacturer Ford，with researchers from Virginia Tech，at the beginning considered using text as a way to communicate the car's intention，but decided it would probably not work universally. The option of using symbols was also rejected，because research shows that a majority of people do not have a good understanding of what they mean.

Finally, the researchers settled on light signals. A white light warned that there were no humans in the car. A slow blinking one indicated that the car was coming to a stop, while a rapidly flashing light cautioned passersby that the car was about to speed up.

Then came the big challenge—testing the signals on real roads. "We needed to try out this new lighting to communicate the intention of the vehicle, but if you've got a driver behind the seat, you still have natural communication between humans," said Andy Shaudt, who led the research team. "So we needed to make it look like a driverless car."

The team designed a car seat costume（戏装）that the driver would wear to cover his or her face and upper body. Of course，the drivers could see very clearly. The researchers then equipped the car with cameras to capture human reactions to a light bar，which flashed one of the three signals when appropriate. Six drivers，all keeping their hands low on the wheel so as not to be noticed，took turns to test driving the car through the busy streets.

The overall reaction to the flashing lights was very encouraging. Who knew costumes could be useful for more than Halloween？

10 . Jeff Bezos, the world’s wealthiest person, was just five when American astronauts stepped on the surface of the moon on July 20, 1969. However, he’s never forgotten the black-and-white footage from the historic moment. Since then, the moon has always been the center of his space dreams which are channeled through his spaceflight company, Blue Origin.

On May 9, 2019, at a meeting held in Washington, DC, Bezos came one step closer to achieving his dream of sending people there, when he presented a model of a lander, Blue Moon, designed to carry both humans and goods to the satellite.

Though details of how Blue Moon will be sent to space remain unclear, Bezos is confident it’ll be ready for its mission (使命) by 2024. He considers it unavoidable to settle in space given our ever-increasing population and fewer resources. Unlike those seeking a home on another planet, Bezos thinks humans will be living in orbital space settlements, which are similar to the International Space Station, except much bigger, each housing millions of people. Space taxis would make it easy for humans to travel between settlements.

But first we need to develop a cheaper way to travel between space and Earth. Bezos may have solved the problem partly by removing the biggest cost of spaceflights—single use rockets—with Blue Origin’s reusable New Shepard rocket, which has made several trips to space and back since 2015.

To encourage future space dreamers, the company’s recently built a free online club that will keep members informed of its progress and challenge them to find solutions to help humans and save earth. It invites students of all ages to draw or write how they imagine humans living and working in space on a self-addressed, stamped postcard and send it to the “Club for the Future” by July 20, 2019. The first 10,000 postcards will be sent to space aboard the New Shepard rocket later this year. When it returns to Earth, the postcards, stamped “flown to space,” will be returned to their owners.