China’s tea culture can be traced as far back to before 2000 BC. The Shennong Emperor discovered tea when a leaf fell into boiled water he was drinking, beginning a tradition that still     1     (exist) nowadays.

During the Tang dynasty(618-907) in China, the culture of tea underwent a remarkable development. When Emperor Lu Yu     2     (author) the highly regarded Classic of Tea (茶经), he set off on a journey that would play a critical role in establishing tea’s cultural     3     (significant) in China. Lu Yu, a monk who later earned fame     4     the’Sage of Tea’ (茶圣), had an enormous impact on the spread of tea drinking and linked     5     to Buddhist ideas, including the harmony and mysteries of the universe. The Classic of Tea is the oldest     6     (know) guide to tea drinking and culture. It covers all aspects of tea culture, from growing to harvesting, producing as well as techniques for farmers and craftsmen     7     (produce) the finest teas.

Throughout the Tang dynasty,     8     culture of tea drinking spread quickly among scholars. Inspired by Lu Yu’s ideas, they added medicinal qualities to tea, praised for     9     (sharpen) the mind. At the same time, wine was falling out of favour for their alcoholic properties, paving a path for tea to spread throughout society     10     to be used in religious occasions and offerings.

3 . A national park is an area set aside by a government for the preservation of the natural environment. The national parks in the United States and Canada center on the protection of both land and wildlife.     1     And those in Africa primarily protect animals.

It is widely thought that the idea of a park or nature reserve under state ownership started in the United States in 1870.     2     Yosemite, Sequoia, and General Grant National Parks were established in the United States in 1890. And the U. S. National Park Service (NPS)was created in 1916 to manage the parks.     3     In addition to national parks, the system included national preserves, seashores, historic parks and sites and so on.

Partly following the American example, movements supporting national parks sprang up in many other countries.     4     . And Canada set up its first three national parks in the mid-1880s. The establishment of modern national parks and nature reserves gained momentum (动力)only after World War I or, in some cases, after World War II in Europe. Great Britain established the administrative machinery for both national parks and nature reserves in 1949.     5    

But interest in parks came later in Asia and Latin America than it did in the Anglo-American countries and Europe.

6 . These days, Fred’s huge skeleton (骨架) was exhibited in the Indiana State Museum. His tusks (长牙) were recently the subject of a research study tracing the life 13,000 years ago of mastodons, distant relatives of modern elephants.

By analyzing the chemicals in Fred’s tusks, a team of researchers was able to construct a detailed account of his seasonal migration patterns. Josh Miller, a paleoecologist (古生态学家) at the University of Cincinnati, is one of the researchers studying Fred. “He has beautifully preserved bones and tusks, which provides a great opportunity for our research,” Miller said.

Mastodons’ tusks generally grow in distinct layers, similar to the tree rings. As a result, the nutrients that build the layers of their tusks can tell us a lot about what they experienced. The team particularly focused their analysis on the variations in two elements in the layers: strontium (锶) and oxygen. The former is the key to understanding where Fred spent his life, while the latter tells us the season he was in any particular region. Then, with some statistical modeling, Miller and his team gained insight into the daily record of Fred’s behavior over ten thousand years ago.

The result indicated that when Fred was young, he would have grown a lot. But there’s a year when his growth is reduced — that’s when Miller’s analysis starts. “Probably like the modern male elephant, a male mastodon is just really obnoxious when growing up to be a bother and often arouses family members’ anger. At that point, the mom and aunts will essentially kick him out of the family”, Miller predicted.

After Fred set off to attend to himself, his tusks reflected where he traveled around. Based on analysis, every summer, Fred would return to mate in Northeastern Indiana, because around this time, his tusks started to show signs of injuries. When competing for mates, mastodons got into huge battles with their own natural weapons, sharp tusks. And that was exactly what brought the story of Fred to an untimely end.

Located in Guanghan city of Southwest China’s Sichuan Province and covering an area of 12 square kilometers. Sanxingdui Site is the remains of the ancient Shu culture, which dates back     1     4,800-2,600 years ago, and is considered to be one of the     2     (great) archaeological (考古的) discoveries in the 20th century. This particular discovery is a strong proof of the     3     (exist) of the ancient Shu State and the integrative pattern of the multi-cultures of the Chinese nation.

In fact, as a cultural site,, Sanxingdui had come into the notice of archaeologists in as early as the 1930s, and     4     (exploration) were made soon. It all began     5     a farmer called Yan Daocheng dug out a number of treasures     6     (accidental) in the spring of 1929. In the summer of 1986, thousands of rare treasures were unearthed from two large newly-discovered sacrificial pits (祭祀坑). The unearthed objects are unique in shape and superior in techniques,     7     (confirm) the extraordinary creativity of the ancient Shu people and their desires     8     (connect) with and understand the universe.

After sleeping for 3,000 years, their awakening has shocked the world. When our eyes     9     (caught) by the creations of the ancient Shu ancestors, it is     10     encounter with a civilization lost for 3,000 years.

Many people around the world may know that paper is one of the Four Great Inventions of ancient Chinese civilization,    1    few would know that more than 1,500 years ago, ancient Chinese craftsmen invented a new type of paper,    2    was called Xuan paper and used mainly for writing and painting.

Xuan paper was first made in ancient Xuan Prefecture, now    3    (know) as Jingxian County in Anhui Province. The traditional process of making Xuan paper is    4     (extreme) demanding and involves over 100 steps. The whole process can take as long as two years    5    (complete), and the skills have been passed down for    6    (generation).

Xuan paper is highly water absorbent, making it a perfect medium for conveying artistic effect in both Chinese calligraphy and ink wash painting. In addition, Xuan paper    7    (design) to be able to last for more than 1,000 years and still keep the freshness of the ink and color on it.

Today in Jingxian County, there    8     (be) many Xuan paper factories and workshops, where the paper is still made by master craftsmen using traditional techniques. And because of    9    (it) long history and the essential role it has played     10    the culture of Chinese painting and calligraphy, Xuan paper was included on the first list of China’s national intangible cultural heritages(非物质文化遗产)in 2006.

10 . While DNA from animal bones or teeth can cast light on an individual species, environmental DNA enabled scientists to build a picture of a whole ecosystem.

A core of ice age sediment (沉积物) from northern Greenland has yielded the world’s oldest sequences of DNA. The 2 million-year-old DNA samples revealed the now largely lifeless polar region was once home to rich plant and animal life — including elephant-like mammals known as mastodons (乳齿象), reindeer, hares, lemmings, geese, birch trees and poplars, according to new research published in the journal Nature on Wednesday.

The finding is the work of scientists in Denmark who were able to detect and restore environmental DNA — genetic material drop into the environment by all living organisms — in tiny amounts of sediment taken from the Copenhagen Formation, in the mouth of a strait in the Arctic Ocean in Greenland’s northernmost point, during a 2006 expedition.

They then compared the DNA pieces with libraries of DNA collected from both extinct and living animals, plants and microorganisms. The genetic material revealed dozens of other plants and creatures that had not been previously detected at the site based on what’s known from fossils and pollen records.

“The first thing that blew our mind when we’re looking at this data is obviously this mastodon and the presence of it that far north, which is quite far north of what we knew as its natural range,” said study co-author Mikkel Pedersen.

The mix of temperate (温带) and Arctic trees and animals suggested a previously unknown type of ecosystem that has no modern equivalent — one that could act as a genetic road map for how different species might adapt to a warmer climate, the researchers found.

Love Dalen, a professor at the Centre for Palaeogenetics at Stockholm University, said the finding “pushed the envelope” for the field of ancient DNA. “Also, the findings that several temperate species (such as relatives of spruce and mastodon) lived at such high latitudes are exceptionally interesting,” he added.

Further study of environmental DNA from this time period could help scientists understand how various organisms might adapt to climate change. “It’s a climate that we expect to face on Earth due to global warming and it gives us some idea of how nature will respond to increasing temperatures,” he explained.