For the past twenty years, Chen Huili,     1     cultural heritage monitor and guide, has devoted herself to protecting the carvings of the Yuanjue Cave, part of the Dazu Rock Carvings in Chongqing.

While showing visitors around, Chen became     2     (pain) aware of the serious damage to the cave caused by the passage of time. The flat-roofed cave lacked something to support its     3     (weigh). As a result, the ceiling (顶部) was coming off in pieces, posing a great threat to the priceless carvings. With related knowledge and great eagerness     4     (save) the sculptures, Chen joined the protection center.

As time     5     (go) by, Chen’s experience grew and eventually her unique approach to     6     (protect) cultural heritage was developed. She     7     (involve) in a number of major projects so far, including the eight-year restoration of the Thousand-Armed Avalokitesvara (千手观音). And with her team’s hard efforts,     8    (measure) such as hydraulic iron frames (液压铁架) have now successfully been introduced to support the roof of the Yuanjue Cave.

    9     her remarkable achievements, Chen remains unsatisfied. In her opinion, it’s highly necessary to improve the role of technology in cultural heritage protection     10     to train young talent for this field. For Chen, Yuanjue Cave will remain a focus and she believes there will be many fruitful discoveries further down the line.

5 . German physicist Albert Einstein is one of the most famous scientists of all time, the personification of genius and the subject of a whole industry of scholarship. In The Einsteinian Revolution, two experts on Einstein’s life and his theory of relativity―Israeli physicst Hanoch Gutfreund and German historian of science Jurgen Renn—offer an original and penetrating(厚利的) analysis of Einstein’s revolutionary contributions to physics and our view of the physical world.

By setting Einstein’s work in the long course of the evolution of scientific knowledge, Gutfreund and Renn discover the popular misconception of Einstein as an unconventional scientific genius who single-handedly created modern physics—and by pure thought alone.

As a large part of the book explains, Einstein typically argued that science progresses through steady evolution, not through revolutionary breaks with the past. He saw his theory of relativity not as something from scratch, but a natural extension of the classical physics developed by pioneers such as Italian astronomer Galileo Galilei and English physicist Isaac Newton in the sixteenth and seventeenth centuries, as well as nineteenth-century physicists.

The authors highlight how classical physics cannot be separated cleanly from modem Einsteinian physics. The book also includes substantial sections on Polish astronomer Nicolaus Copernicus and Galileo whose methods inspired Einstein. When Einstein considered himself as standing on their shoulders, he meant that, without their contributions, he would not have formulated(阐述) the theory of relativity.

The Einsteinian Revolution is an important and thought-provoking contribution to the scholarly literature on Einstein and his surprising scientific creativity between 1905 and 1925. Gutfreund and Renn might not have given the final answer as to why Einstein, of all people, revolutionized physics in the way that he did. But they argue in fascinating detail that, to understand his genius, one must take into account not just the earlier history of physics but also the history of knowledge more broadly. Although not always an easy read, the book will interest physicists and historians alike.

Disha Florence never thought she would become a web novel writer. The lady from Bangladesh, was trying to find a way to free     1     (she) from the restrictions faced by a woman, a wish she has had since she was 8. It was then that she observed that being a girl meant she couldn’t play in the park like boys, and that she     2     (have) to learn to do housework.

As she grew up, she realised that     3     experience and knowledge, it’s impossible to be free. Therefore, while     4     (continue) her study, Florence worked as a volunteer, going to places and meeting people with or without her parents’     5     (permit). Her father told her, “You need to make your own money to do as you wish.” Florence found this advice logical,     6     didn’t know what to do.

At 22, she noticed on the Chinese reading app Webnovel that the website was hiring authors who     7     (say) to be able to make much money.

Without thinking further, Florence started writing and became     8     professional web novelist. Inspired by popular Chinese “CEO novels” on the app, Florence wrote her     9     (one) book. This story about self-respect and self-love,     10     characters are Chinese, is set in Europe.

Now Florence has about 164,200 readers on Webnovel and is working on another two books.

Benjamin Franklin’s famous experiment with lightning has introduced     1     (generation) of children to science. However, new research suggests that the story may be fiction instead     2    fact.

Franklin    3     (fly) a kite during storm in 1752, when there was much interest in electricity. Franklin raised the kite with a piece of string     4     (tie) to it. A metal key was attached to the string. After     5    experiment, he said that lightning was a form of electricity.

However, neither the story     6    the details of the experiment are entirely true because scientists all agree that if Franklin had     7     (actual) touched the key, he would certainly have died from the     8     (electricity) shock. Scientists often question accepted ideas because they want     9     (establish) the facts.

In science, facts should    10     (prove) by experiments and research, and we should not always believe everything we read or hear.

9 . A common claim states that a sheet of paper cannot be folded in half more than seven times. But is this true?

In 2002, Britney Gallivan, then a junior in high school in Pomona, California, folded a single piece of paper in half 12 times. She currently holds the Guinness World Record for the most times to fold a sheet of paper in half.

The prompt that led Gallivan to accomplish these feats was an extra-credit challenge in math class to fold anything in half 12 times. Her teacher asked the students to fold something thicker: a piece of paper.

Gallivan said “it was very frustrating, as I had many unsuccessful attempts at trying to fold different papers in half. I began to question if folding paper in half more than eight times could be impossible.” However, Gallivan recalled. “I knew I needed to understand what was limiting the folding progression.”

The equations that Gallivan came up with calculated how many times a sheet of paper could be folded. She found that in order to fold many times, a long thin sheet is needed — the more a sheet is folded, the thicker the resulting stack becomes, and once the stack becomes thicker than it is long, there is nothing left to fold. She ultimately set her record with a sheet of tissue paper she found online that was 4,000 feet (1,219 meters) — more than three-quarters of a mile, or over a kilometer — long, Guinness World Records noted.

“Working on the problem took a tremendous amount of time and effort,” Gallivan said. “As frustrating as it was at times, I learned an immense amount from the experience, which has been valuable to me throughout my life in more capacities than one would expect.”     

Since Gallivan set her record, others have made claims of folding a sheet of paper more than 12 times. Still, “I anticipate that my current record will be surpassed,” Gallivan said.