The Internet is a technological wonder,     1     (bring) about far-reaching changes in all aspects of our lives.     2     connects people across the world to a single shared community and has brought us some life-changing advantages. With     3     help of the Internet, people can have quick and easy access to a huge amount of information, ranging from the weather to military affairs. Besides, it has also made our lives     4     (unbelievable) convenient. People can do a lot of work through the Internet, including having food     5     (deliver) to your home, calling a taxi, making     6     (arrangement) for your travel, and so on. Above all else, the Internet helps us maintain social ties. With all sorts of communication software, physical distance no longer gets     7     the way. No matter where we are, there are endless ways       8     (share) our views on matters or lets someone know we care about them.     9    , only when the Internet     10     (use) safely can it be a place of discovery, wonder and inspiration for everyone.

Some people believe that the Internet is     1    (harm) to friendships. Talking to people on line or     2    (communicate) through a screen makes it more difficult to concentrate or show     3    (kind) to others. While it can connect you with other people     4    use social media, face-to-face contact with others is important to help you build lifelong friendships. This is thought-provoking because it shows that people still need face-to-face communication with others today.     5    (spend) too much time on the Internet can also make you self-centred, because you can become obsessed with     6     (popular) and gaining “followers”. Finally you need to be careful with various online relationships, because you can never be 100 percent sure that     7    you read online is true.

However others believe that the Internet can help develop friendships in many ways. Firstly, the Internet makes communication much     8    (convenient). Secondly, the Internet has also made communication more fun. You can share photos, videos, news stories and website    9     your friends online. Thirdly, online communication can     10    (actual) bring people closer to each other.

Chinese volunteers have     1     (success)finished a one-year test living in a simulated(模仿的)space lab. The total length of the test, which started on May 10th last year, reached 370 days, thus setting     2     new record for the     3     (long) stay(停留)in a simulated space lab.

The space lab,     4     (call)the Yuegong-1 or Lunar Palace 1, measures around 150 square meters. It is consisted of four sleeping     5     (room), a bathroom, a waste-treatment room and a room for raising animals. The Yuegong-1 provides everything humans needs to survive in an environment similar to that of a space station     6     outer space.

A total of eight volunteers, all of whom are students at Beihang University, took turns living in the space lab. In the     7     (begin), they were expected to stay in the Yuegong-1 for 365 days, but the project ended up     8     (last)for 370 days. The goal of the project “Yuegong 365” is to test the limits of humans’ ability     9     (live)in a closed ecosystem for China’s manned moon landing ambition. The success of the project     10     (mean)that China goes one step closer to putting people on the moon.

China recently made history by successfully landing a spacecraft on Mars. The event marked a major step in China's space program and launched a new international exploration effort on the Red Planet.

China's space program had already completed several successful unpiloted missions to the moon. The country's last spacecraft     1     (land) there was able to successfully collect material from the lunar surface. It was the first time in more than 40 years that any nation     2     (collect) moon material for return to Earth.

Landing a spacecraft on Mars, however, is much more difficult than landing on the moon. Historically there have been many crash landings on Mars. So far only three nations — the United

States, China and the Soviet Union (USSR) — have successfully landed spacecraft. The U. S. has had nine successful Mars landings since 1976. This includes its latest mission     3     (involve)the U. S. space agency NASA's Perseverance explorer, or rover. The USSR's Mars 3 spacecraft landed safely in 1971. But that mission ended seconds later     4     the spacecraft's instruments failed.

There are currently other spacecraft     5     (operate) in orbit around Mars, one of them     6     (launch) by the United Arab Emirates. Three other orbiting spacecraft belong to the U. S.; two are European and one is from India.

China's Tianwen-1 spacecraft — which includes an orbiter, lander and rover — spent seven months on the trip to Mars. Its rover Zhurong was named after the Chinese god of fire. The six-wheeled vehicle is solar powered and     7     (weigh) kilograms. It has the most advanced cameras and instruments     8     use radar, laser and sensors to measure atmospheric conditions and magnetic forces.

NASA Administrator Bill Nelson praised China's successful landing on Mars. "     9     the international scientific community of robotic explorers on Mars grows, the United States and the world look forward to the discoveries Zhurong will make to advance humanity's knowledge of the Red Planet, his statement read. "I look forward to future international discoveries, which will help inform and develop the capabilities     10     (need) to land human boots on Mars/Nelson added.

Would you like to have your own satellite? You can now buy one on Taobao! Commsat, a Chinese commercial space company, has     1    (recent) put three commercial satellites on the shelves of     2    (it) store on Taobao.

The simplest satellite, weighing less than 5 kilograms,     3    (call) the 1U cube satellite (1U立方星),     4     costs 2 million yuan. It looks like a magic cube on the outside, but it is equipped with space cameras and solar panels (太阳能板). Targeted at school education, it could enable students to operate satellites like space     5    (scientist), according to Commsat. It can also be used for research purposes.

The company also offers satellite services, such as taking selfies (自拍照) with the Earth. The customer only needs to upload their own photos,     6     the satellite will show the photo or screen or in space. It will take the selfie using Earth     7     the background.

Chinese internet celebrity sold Commsat’s satellite in his livestreaming (直播) event on March 31st. A buyer     8    (buy) the first satellite six minutes after the even started,     9    (mark) the first purchase of a satellite on an e-commerce platform in the world, according to Beijing Daily. Although buying such high-end products seems far away from most people’s lives, it will help popularize space technology,     10    (comment) Global Times.