The college entrance examination is just around the corner. Homework and tests will keep many of you up late at night, and you may plan to make up for your lost sleep during the weekends. {#blank#}1{#/blank#} is it useful? A study published in the journal Current Biology completely has changed {#blank#}2{#/blank#} people used to think. It shows that the habit of sleeping in on weekends doesn't fix the damage done by a lack of sleep during the week. Even {#blank#}3{#/blank#} (bad), it may damage your health.

It was the end of the school day, and I was tired. I grabbed a pile of about 130 exam papers to1 on the train ride home. I'd bring them back the next morning.

My principal (校长) pushed her head into my classroom and said, "Friendly2 ! You need to make sure your word wall is3 by tomorrow morning." She then moved on to the next classroom to4 the message. I sighed and thought, "Are you making a(n)5 ? What a waste of my time!"

My principal was6 about making our school beautiful, while my goal was to get my students to pass the Algebra Regents Exam. She wanted every classroom to have a word wall, where student's works on creative projects would be7 . She brought in beautiful planters (花盆) that8 the hallways with greenery. However, I assume that school and classroom9 aren't important when it comes to learning. To me, spending time and money making our school and classrooms beautiful was just a distraction (使人分心的事). Those things don't10 my students with math.

However, after three years of teaching, I went to graduate school in part to study how resources 11 teachers and students. What my research found 12 me: When teachers 13 their classroom environment resources, their students did better on standardized tests. My principal was 14 . She was creating more than just a beautiful 15 —she was building a welcoming and positive environment for students to learn and teachers to work.

Njobati, a young woman from Cameroon, faced a challenging journey when she moved from her English-speaking area to a French-speaking area of the country to attend university. The sharp differences between these areas, once part of the British and French empires, made it difficult for her to fit in, which led her to examine her own identity—who she truly was. 

Seeking guidance, she turned to her grandfather who also felt disconnected from his own culture. He expressed sadness about what the Nso had lost both culturally and materially, including Ngonnso statue. Ngonnso was the founder of Nso dating back to the 14th Century, whose statue was an important cultural symbol for the Nso. However, it was taken by the Germans in 1902 and has been housed in Berlin's Ethnological Museum ever since.

Inspired by her grandfather's desire and saddened by the loss of culture, Njobati made a promise to bring back the statue. She believed it would not only achieve her grandfather's wish but connect her with her Nso heritage again.

Njobati did many researches about the statue and former unsuccessful attempts. She realized that restitution ( 归还) was actually about facing the colonial ( 殖民主义的) past. Njobati decided to try differently. To gather support online and offline, Njobati began a grassroots campaign. She organized meetings in community halls and churches, met people one-on-one, and used the power of social media. Through Twitter, she established contact with the Ethnological Museum. 

Njobati's tireless efforts paid off. She was told that a decision about Ngonnso statue was coming, which was an important moment for her.

"Finally, this is happening. Not just for me, but for the Nso people, and for Cameroon, " She cried. "This also lends a hand to other communities that are seeking justice for stolen culture relics. "

A City in the Jungle

In the summer of 1848, in Guatemala, a man called Ambrosio Tut went out into the jungle, as he did almost every day. Tut was a gum collector, looking for gum in the jungle. {#blank#}1{#/blank#}One day, he got to the top of one tree and something caught his eye. He looked out across the trees and saw the tops of some old buildings. 

{#blank#}2{#/blank#}He ran to tell the local governor excitedly, and together they walked into the jungle. There they found Tikal, the city that the Mayans had built many hundreds of years before. The two men saw pyramids, squares and houses. 

For a long time before that day, local people had known that somewhere in the jungle there was an old Mayan city. {#blank#}3{#/blank#}Between 200 and 900 AD, the city of Tikal had been the centre of Mayan civilisation(文明) in the area, but then the Mayans left it—nobody knows why!After 1000 AD, the jungle began to cover it. {#blank#}4{#/blank#}

Seven years before Tut found Tikal, two British explorers had gone to Guatemala and had written a report about Mayan treasures in the jungle—but they hadn't mentioned Tikal. Even earlier than this, local Indians had told people about a great city hidden in the trees, but no one had listened to them. {#blank#}5{#/blank#} Now the lost city had been found again, and people went there immediately to see it. 

A. But no one had seen it for centuries. 

B. To do this, he had to climb the trees. 

C. And then people forgot that it was there. 

D. So they lost the chance to find the treasure. 

E. Tut found many other treasures after that. 

F. More and more scientists began to study the Mayan city. 

G. Tut didn't really know what he had seen but he knew it was something special. 

The Aviation Industry Corporation of China (AVIC), China's leading aircraft maker, created the country's first fully solar-powered drone (无人机). The large drone, Qimingxing 50, took off at 5:50 pm on September 3rd, 2022, from an airport in Yulin of Shaanxi Province and stayed in the air for 26 minutes before landing on the same runway. AVIC said that all systems of the unmanned plane functioned well on its first flight.

Powered by six electric motors with solar batteries, the drone is designed to conduct long-time operations in near space. Near space is that part of Earth's atmosphere at altitudes of 20 to 100 kilometers. It is above the top altitudes of commercial airliners but below orbiting satellites.

Qimingxing 50, also called "quasi-satellite", features high operational efficiency and eco-friendliness and will be tasked with high-altitude reconnaissance (侦察), forestry fire monitoring, atmospheric environmental inspection, aerial mapping, communication signal relay and other operations.

"Thanks to its capability to conduct very long endurance flights in near space, the drone can essentially become a substitute for satellites," a Chinese aerospace expert said. Satellite services are not always available due to the limited number of satellites and relatively fixed schedules of overhead passes. In time-sensitive missions, near-space drones can offset these disadvantages, the expert said, noting that satellite services could also be damaged in wartime, so near-space drones could replace them in this occasion.

The successful first flight of the Qimingxing-50 lays a solid foundation for the development of key technologies in the country's new energy field, the composite (复合的) material field, which will enhance China's ability to perform tasks in near space and over far oceans. AVIC will seize the opportunity to increase investment and speed up the development of large solar-powered unmanned aircraft.

In 2014, Amy collapsed from a brain hemorrhage (脑溢血) while working. After a year recovering at home, she 1 a course with the ambition to become a 2 .

However, occasional vision disturbance was still 3 , influencing the amount of 4 she could give to the course. Further complications (并发症) left the young artist almost completely blind, making it difficult to see a whole figure. It's particularly 5 because it seemed to 6 her optimism to be a painter! 

One morning, when watching the sunrise, she suddenly felt a sense of 7 . She realized that she may not 8 a whole face anymore, but it shouldn't stop her from putting what she could see on canvas (画布). The following years, she 9 her special art journey.

"Strangely, my experience has increased my 10 when drawing, enabling me to catch a character better," she explains. "People often speak highly of the detail and sensitivity of the character. I have more determination and appreciation for my 11 . These are 12 I wouldn't have had without everything I've 13 ." For her new touring exhibition, she has produced a series of artworks based on her visual experience. "In the 14 interaction between what I can and cannot see lies my perspective on the world."

Sometimes, we can turn a loss into a gain: something unique and individual that has been gifted to us by never 15 .