Over the years, digital cameras have been getting smaller and smaller,     1     (make) it easier for people to snap a picture,     2     now researchers have developed the world’s largest digital camera.

It’s really beyond     3     (imagine) to think about its size. Standing at 1.65 metres tall and weighing almost three tonnes, the camera is powerful enough to snap     4     image of a golf ball from 15 miles away, and sensitive enough to spot objects     5     are 100 million times dimmer than those visible to the human eye.     6     (name) the Legacy Survey of Space and Time (LSST), the camera will help scientists to study and record 20 billion galaxies.

The camera will survey the southern night sky for a decade, creating a lot of data that scientists will consider to better understand dark matter. Dark matter is a(an)     7     (visible) substance that is thought to make up a large part of the universe.

The LSST camera has taken more than seven years     8     (build) and can produce super-sharp images at incredible resolution. The images     9     captures will be so big that it would take 378 ultra-high-definition TV screens to display one at full size.

At the moment, engineers are performing tests on the LSST camera. Once all the tests     10     (complete), the camera will jet off to its new home—an observatory high in the Andes mountains of Chile.

Smartphones have become an essential part of our daily lives. However,     1     (protect) younger students’ eyesight and make sure they focus on their studies, primary and middle schools will have more specific rules to limit students’ mobile phone use on campus.

The Ministry of Education     2     (release) a notice in January that restricts primary and middle school students from carrying mobile phones to school. Those who still require their phones for some reason must get their parents’ and teachers’ approval and must hand their phones over during class time.

The policy aims to improve students’ focus on study and fight for    3     (addict) to the internet and games.

Technology giant Tencent has announced plans     1     an almost entirely car-free “city of the future” in Shenzhen.

Known as “Net City,” the 2-million-square-meter urban development (都市开发区) will pay more attention to green spaces and self-driving vehicles, according to     2     (it) designers.

    3     (design) to accommodate (容纳) a population of some 80,000 people, the site of this city-within-a-city will primarily serve Tencent, the company behind WeChat and China’s popular QQ messaging service.

But as well as providing company offices, the neighborhood is expected     4     (host) shops, schools and other     5    (convenience) facilities.

It will     6     (connect) to the rest of Shenzhen via road bridges and     7     city’s subway system. The firm behind the master plan, NBBJ, hopes that the new district’s parks and waterside promenade (步行大道) will attract     8     (visitor) from elsewhere in the city.

The plan differs from the enclosed campuses pioneered by big tech companies in recent years, according to Jonathan Ward, a design partner at NBBJ. “It’s     9     (definite) a wonderful destination,” he said in a phone interview. “It’s not meant to be an enclosed island — it’s a city full of life and energy,     10     will be a vital hub (中心) for Shenzhen.”

We are now in the Fourth Industrial Revolution, due to the scientific technology's evolving     1     (rapid). Many of us are looking forward to seeing popular science fiction turn into a     2     (real) in the coming years. As is known to all, there have existed many great scientific inventions that are ready to go off the shelf. Either those that     3     (develop), or those that are in the process of designing. The imaginations we laugh at today will end up     4     (surprise) us in the future when they become real.

One of the most     5     (ambition) plans of China is to get 17 different countries to work for the idea of getting the western world linked to the eastern one via a high-speed rail line. We are not talking about connecting Eastern and Western China     6     train; we are talking about connecting London and Beijing. Another one is that the US might have created something     7     looks and sounds like a flying car,     8     (call) “flying Humvee”. But the rest of us still have to wait for this invention to turn up. Nevertheless, at least that should count as     9     achievement.

If you think there     10       (be) a great many other out- of-the-world inventions that are promising in the near future, please share them with us.

In the not-too-distant future, we     1     (live) in smart homes     2     will keep us secure, save us energy, and provide a more comfortable environment. Intelligent controls will control just about everything in our home. For example, they will use integrated     3     (sensor) to go into an energy-efficient mode when we leave home while     4     instant we get home, we’ll find everything     5     (prepare) for us, including dinner, our favourite music or TV programmes. In addition, smart homes will be monitoring our health every day. If they find there is something     6     (normal) or we have a critical illness, they will give us a warning early on and     7     (potential) save our life. Smart homes will also be able to prevent serious damage from accidents. If they find something wrong, they will detect it and provide us     8     the relevant information for us     9     (fix) the problem.

In a word, this smart technology is not a fantasy. Nevertheless, it will be some years     10     most new homes begin to use it.