Several large wooden constructions     1     ( date) back to the Neolithic era（新石器时代) were unearthed at the Jijiaocheng ruins site, a prehistoric cultural site located in Changde City, central China's Hunan Province.

First discovered in 1978,the site used     2     ( be) a city from the Qujialing culture period (3300 BC-2600 BC) - a Neolithic civilization,     3     had roots in the middle and upper reaches of the Yangtze River primarily     4     (find) in today's Hunan and Hubei provinces.

Researchers     5     (conduct) three excavations(挖掘)at the southwestern part of the city wall since 2020. More than 30 housing sites were discovered at the 721 -square-meter area,     6     a number of wooden architectural relics unearthed that were built 4,800 years ago. Researchers think they are the most complete and     7     (early) wooden structure building foundation in China. Besides, remains of rice husks (外壳) were also found at the site, covering     8     area of 80 square meters.

Researchers believe     9     ( strong) the new findings will enrich the architectural history of prehistoric China. " The     10     ( discover) helps us understand the overall architectural style of the Yangtze River Basin," said Zhao Hui, a professor at Peking University School of Archaeology and Museology.

One of the ways that early Chinese immigrant laborers who were held on the Angel Island in the US protested their ill treatment     1     (be) to write and carve poetry on their camp walls. The poems were almost lost to history until a former California state park ranger discovered them in 1970 when the park service was planning     2    (tear) down the building and reconstruct the site. With the news of the discovery     3     (spread) rapidly, their descendants, volunteer professionals and students launched a nationwide campaign to preserve the camps and the poems     4     (carve) within them.

Since the 1970s, various efforts     5     (make) to preserve the poems. Today, more than 200 have been discovered and documented.     6     majority of the poets were male villagers, often with little formal education, from China's     7     (south) rural regions. Most of their poems follow the Chinese classic poetic forms with even numbers of lines: four, five, or seven characters per line; and every other two lines in rhyme.

I had read the poems and about their history, but it was not until I visited the site of the camps in 2016 and saw those carvings on the walls     8     I could deeply appreciate the laborers' anger, frustration, and desperation. I can only imagine the     9     (hard) they suffered on the isolated island upon arriving at the so-called promising land     10     which they had long dreamed.

4 . If you love chocolate, maybe you have eaten a bar of Cadbury's Bournville chocolate. But Bournville isn't just the name of an English chocolate bar. It's the name of a village which was built especially for workers at the Cadbury's chocolate factory.

George and Richard Cadbury took over the chocolate business from their father in 1861. A few years later, they moved the factory out of the centre of Birmingham, a city in the middle of England, to an area close to the railways and canals so that they could receive milk deliveries easily and send the finished products to stores across the country. More importantly, here, the air was much cleaner than in the city, and the Cadbury brothers thought it would be a much healthier place for their employees to work.

They named the site Bournville after a local river called "The Bourn" and "Ville", the French word for town, was used because at the time, people thought French chocolate was the highest quality. The new factory opened in 1879. Close to it, they built a village where the factory workers could live. The Cadbury brothers thought their workers deserved to live and work in good conditions. In the factory, workers were given a fair wage, a pension and access to medical treatment. The village provided everything that workers needed including a shop, a school and a community centre where evening classes were held to train young members of the workforce.

The Cadbury brothers were among the first business owners to make sure that their workers had good standards of living. Soon, other British factory owners were copying their ideas by providing homes and communities for their workers designed with convenience and health in mind.

Today, over 25,000 people live in Bournville village. Over a hundred years since the first house here was built, the aims of its founders have still been carried out.

The history of Chinese Teachers⁵ Day     1     (date) back to the Han Dynasty. It is a day of respecting teachers and education. In the past, on August 27 each year, the birthday of Confucius, the emperor,     2     (follow) by court officials, would go to Confucius' temple in honor of the ancient philosopher and would also invite royal teachers to the court for a feast. And on this day, teachers around the nation enjoyed     3     day's break and     4     (give) dried meat as gifts.

Excellent teachers would be chosen from academies and     5     (institution) across the country to report     6     (they) deeds to the royal court and be presented with 500 liang silver coins as awards. In the Qing Dynasty, well-performing teachers would be promoted to     7     (high) positions than before or obtain a salary rise.

The customs to show respect to teachers varied from region to region. Today, the goal of Teachers⁵ Day is to form a social climate     8     teachers are respected and knowledge is valued. And its date is     9    （official）set at the beginning of the school year. The celebration includes congratulations     10     students, recommending outstanding teachers, the exchange of ideas among teachers, and so on.