A Chinese university has built the world’s longest 3D-printed bridge. The creation has a     1    (long) of 26.3 meters and a width of 2.6 meters. Its design came from the historical Zhaozhou Bridge     2    (build) in AD 605.

    3     the ancient Zhaozhou Bridge required a decade to build, the team spent only 450 hours    4    (complete) all of their new bridges concrete parts. Besides, the bridge’s cost came in at just two thirds of that of     5     ordinary bridge.

The bridge consisted     6     44 individual 3D-printed concrete units, each of them approxi-mately 3 by 3 by 5 feet. The sides, influenced by the Zhaozhou Bridge,     7    (make) with 68 single concrete plates moved into place by robot arms.

The leader of the team noted that “the demand for labor in construction projects will be in short supply increasingly” in the future. If China cannot find people to build bridges, “intelligent construction will become an     8    (importance) channel to solve this problem”.

There     9    (be) other 3D-printed architectural projects over the last few years, as the technology has become    10    (popular) than before. A team at MIT built a sample house in 14 hours. If there are ever houses on Mars NASA suspects the houses also will be built by robots using 3D printing.

Chinese Language Day

Language Days at the Untied Nations seek     1    (celebrate) multilingualism (多语言) and cultural diversity as well as promote equal use of all six official languages throughout the     2     (organize).

The date for the Chinese day was selected from Guyu, which is the     3    (six) of 24 solar terms in the traditional East Asian calendars (日历),     4     (usual) beginning around April 20.

Chinese was established as an official language of the United Nations in 1946.     5    , in early years, Chinese was not commonly used in the work of the United Nations. The situation     6     (improve) after the Peopled Republic of China regained the lawful rights in the United Nations in 1971. In 1973, they     7     (include) Chinese as a working language,     8    was used by more and more UN offices and staff members.

In celebration of United Nations Chinese Language Day 2021, UNSRC Chinese Book Club     9    (be) organizing three events under the theme “Highlighting Pictographs (象形文字)”. The three events focus     10    three types of characters connected with three cultures and three UNESCO World Heritage sites. All the three events will be shown live.

We know that being a teenager is sometimes full of     1     (challenge). To help you along the journey to adulthood, we have designed TeenHealthWeb     2     has many articles about teenagers’ physical and mental health. You can look through these articles to find     3     (advise) on your problem. If it hasn’t been addressed, you can visit the “teen health” forum on our website instead. We can     4     (proud) say this forum is the heart of our website. Users     5     (encourage) to post their problems, and they will get useful tips from our health experts and other forum users. Before     6     (write) your post, however, you’d better take a look     7     other users’ posts first.     8     is likely that the matter has already been discussed on our forum. If your problem is a new one, write a post about it. Our health experts will be     9     (delight) to offer you help and tell you how     10     (improve) your situation.

The Spring Festival family dinner is a big event for Chinese families. For this year’s, my son has booked a table at the best restaurant in town,     1     I’m a bit unhappy about it. For me, it just won’t feel like Spring Festival having the dinner out.

When I was a little boy, the dinner     2     the eve of Spring Festival was     3     I looked forward to most. It was not only for the delicious food that we seldom got to eat, but for the opportunity     4     (have) our whole family gathered together. I would run around the house     5     (listen) to the adults chatting about their year. I’d get under my mother’s     6     (foot) in the kitchen, watching her make dumplings. She’d put tokens in some dumplings: candies for     7     sweet life and peanuts for a long and healthy one. In the evening, all of us would sit around the table, enjoying the food and being together again. We toasted each other, we laughed, and the simple, homemade dishes     8     (taste) more delicious than anything cooked by a top chef. I hope my children and     9     (they) children will still value our memories of preparing the dinner together. To me, the process is even     10     (important) than the dinner itself.

Are computers going to be smarter than people someday? Maybe. But are they going to tell    1    (story) and have a sense of humor? Ray Kurzweil believes this will happen. Ray Kurzweil is an author, and    2    (invent), a computer scientist and a futurist. He makes predictions (预测) about computers. He believes that by 2029, computers will do things    3    (good) than humans. He predicts that by 2045, computers will be more powerful. Someday soon, he says, we    4    (have) little computers in our brains.

Kurzweil is good     5    making predictions. For example, here are a few of his predictions from his book. The Age of Intelligent Machines, written in the late 1980s: Documents will include more than just words and they will include voice, music,     6    other sounds; computers will be as common as pencils and books in schools; we will use wireless networks    7    (share) information.

Kurzweil is now working on a project     8    will improve the way computers search. He predicts that one day computers will     9    (actual) understand our questions. He also thinks technology is going to help     10    (we) live longer.

The United Nations is not only committed to protecting people. It     1     (look) after places, too. One of the aims of UNESCO——the United Nations Educational, Scientific and Cultural Organization——which was founded     2     1946, was to protect places of great cultural importance. Its first major task was in the 1950s,     3     it launched a campaign to protect two ancient Egyptian temples. The temples were going to be     4    (complete) flooded with the construction of the huge Aswan Damn. The temples     5    (take) to pieces and rebuilt on dry ground. Fifty     6    (country) donated money to the project.     7    (it) success led to other projects to protect Venice, in Italy, a unique city built on water,     8     Moenjodaro, in Pakistan, one of the cradles of civilization.

If a site is put on the List of World Heritage in Danger, it means that it will receive money from the World Heritage Fund     9    (help) protect it. However, countries must make as much effort as they can to look after their special places and preserve the world’s remaining cultural and     10    (nature) heritages for the future.

The Taj Mahal (泰姬陵) ,     1     was built between 1631 and 1648, is a masterpiece of architecture.     2     took more than 20,000 workers and 1,000 elephants to complete the project. In     3     early 17th century, India was ruled by an emperor     4     (name) Shah Jahan. The emperor loved his wife so much that when she died, he built the TajMahal in her memoy. Shah Jahan was later buried next     5     his wife, and the couple now rest together forever.

If the Taj Mahal is a     6     (celebrate) of the heart, then the Imperial Tombs of the Ming and Qing Dynasties are a monument (纪念碑) to the mind and spirit. Built by several emperors between 1368 and 1915, the Imperial Tombs represent Chinese cultural and     7     (history) values that have been handed down from generation to generation for     8     ( thousand) of years.

Over the years the UNESCO World Cultural Heritage Sites programme     9     (attempt) to design activities and work out laws    10     (preserve) the best of human history. Masterpieces such as the Taj Mahal and the lmperial Tombs of the Ming and Qing Dynasties remind us of what we can achieve, and inspire us to live up to our great past in the future.