Antarctica is one of the last real wildernesses     1     (leave) on the earth. Since it was first explored in the late 19^th and early 20^th centuries, various countries     2     (try) to use it for different purposes.

However, in 1961, 12 countries agreed to sign the Antarctic Treaty. This means that the entire area was     3     nuclear-free zone and could only be used for     4     (peace) purposes. Antarctica became the biggest laboratory in the world, with many scientists     5     (conduct) research there. Today 42 countries have signed the treaty, and have sent scientists to study in the area. Every summer, 3,000 scientists arrive to carry out a variety of research     6     (project).

Unlike the Arctic in the north,     7     is just made up of ice, Antarctica is an actual land mass. In fact, it is one     8     (ten) of the land surface of the earth. Over 140 million years ago, Antarctica was a green and living place. However, the land mass     9     (gradual) moved to the colder areas in the South, and now it is just as frozen as the Arctic.

Tourism has finally reached the great frozen wilderness. People come to see the local bird life, to go mountaineering, or to visit the South Pole.     10     we are not careful, it will not remain a wilderness for much longer.

I wake up to the sound of the wind buffeting the cloth of my tent. Even though the sun is    1    (bright) shining, telling whether it is morning or night is impossible. I’m above the Arctic Circle,    2    in summer the sun never sets. I’m in the remote far north of Sweden in Sarek National Park,    3    place with no roads or towns.

Around 9,000 years ago, reindeer began to arrive at Sarek’s mountains. Following the reindeer    4    (be) the Sami people, who made this territory their home. In 1909, Sarek was made a national park    5    (keep) the land in its natural state.

For hundreds of years,    6    (look) after reindeer was a way of life for the Sami. Today, most Sami have houses in villages near Sarek and live a modern life just    7    their neighbours and enjoy their    8    (tradition) as before.

After breakfast, I pack my bag and set out again. Being in such a    9    (beauty) and wild place makes me feel    10    (bless) to be alive.

Peru is a country on the Pacific coast of South America. Its capital is Lima,     1     is in the north on the coast. It’s the motherland of the Inca civilization and home to Machu Picchu. Once governed by Spain, Peru gained its independence in 1821. Cuzco,     2     ancient Inca Empire capital, is a popular destination with many hotels and inns where both Indian and Spanish culture and art can     3     (see).

San Francisco is an amazing city in my eyes. Although it is a city where earthquakes frequently happen, it is attractive to many    1     (visitor) every year. The Mission District is one of    2     oldest parts of the city, which used to be poor but now is a centre for art, music and food. Gold was once found in San Francisco, so many people came here    3     (seek) their fortune.    4     (definite), not everyone had that luck.

Jingdezhen porcelain(瓷器)is Chinese porcelain produced in or near Jingdezhen in southern China. Jingdezhen has produced porcelain     1     (century)ago. And the town     2    was named Jingdezhen by Emperor Zhenzong of the Northern Song Dynasty became a major kiln(窑)site around 1004.During the period, the     3    (produce)of porcelain in this area first became     4    (know).By the 14th century it had become the largest centre of producing Chinese porcelain, which remained in the following times. In the Ming Dynasty, official kilns in Jingdezhen     5    (control)by the emperor, making quality porcelain in large quantities for the emperor to give abroad as gifts. As a result, the town was     6    (close)linked to the world.

Although being a remote town in a hilly area, Jingdezhen is near the quality porcelain stone and forests which can provide plenty of wood for the kilns. It also has     7    river flowing from north to south,     8    (benefit)the transport of the fragile objects.

Jingdezhen has produced a great variety of     9     (value) porcelain. As a result, the town is famous     10     the “Porcelain Capital”. One type of its well-known high quality porcelain object is the blue and white porcelain from the 1330s.

Macao is an interesting place and it has a long history. It is part of China and most people     1     (live) there are Chinese.

The first     2     (European) in Macao came from Portugal. More than four hundred years ago the Portuguese     3     (go) there to trade with China. Some settled and made their homes there. Strong forts (要塞)     4     (build) to guard the city and the harbor. They also built churches, schools, hospitals and other places.     5     (gradual) the city grew. People from many other countries came to live and work in Macao.

Today many people live in Macao. Some only go there to watch dog-racing or motor-racing     6     even to gamble with their money. But Macao is a quiet and     7     (peace) place. It is pleasant just to walk around and look at the old buildings and forts. You feel you are back in the old days. When you are hot and tired, there are small cool gardens to rest     8    . When you are     9     (hunger), there are good restaurants with many kinds of food. Nearby are some islands,     10     are also nice to visit and are easy to get in. There are certainly a lot to see and to do in Macao.

China’s Liangzhu Archaeological Site     1    (declare) on the list of World Heritage sites on Saturday by UNESCO’s World Heritage Committee during its 43^rd session in Baku, the capital of Azerbaijan.

The site,     2    is located in Yuhang District in Hangzhou City in China’s eastern Zhejiang Province, showcases the civilization of prehistoric rice agriculture between 3,300 B.C.     3     2,300 B.C. The ruins of ancient Liangzhu city were discovered in 2007, and then large dam sites     4    (surround) the Liangzhu ancient city were unearthed continuously after 2009. It was     5     (official) submitted to UNESCO in 2019, hoping to win     6     (recognize) as a World Cultural Heritage Site. The site     7     (include) archaeological remains and unearthed cultural relics of the Liangzhu Ancient City as well as a wetland that covers     8     area of 908. 89 hectares in a plain river network. It is also found that the Liangzhu ancestors started to use characters about 5 ,000 years ago, 1 ,000 years     9     (early) than previously thought, according to Colin Renfrew, a retired professor of archaeology at the University of Cambridge.

The World Heritage Committee added Liangzhu to the UNESCO list    10     (encourage) better protection of the site, considered to be of “outstanding universal value” to humanity.

On Aug 13, four Chinese irrigation sites won global     1    (recognize) and were added to the 2018 list of Heritage Irrigation Structures, among     2     Dujiangyan is the oldest and only surviving damless irrigation system in the world.

Built over 2,000 years ago in     3     is now Sichuan Province in Southwest China，this amazing engineering achievement is still playing a crucial role in irrigating farms and providing water resources for more than 50 cities in the province.

In ancient times, the region in which Dujiangyan now stands     4    (threaten) by frequent flooding from the Minjiang River. Li Bing, a local official of Sichuan Province at that time, together with his son, decided to construct an irrigation system on the Minjiang River     5    (prevent) flooding. After many studies, they found the     6     (simple) solution was to build a dam, but this would have ruined the Minjiang River. So instead Li designed a series of     7    (channel) built at different levels along Mount Yulei that would take away the floodwater while leaving the river flowing     8    (natural). Better still, the extra water could be directed to the dry Chengdu Plain,     9    (make) it suitable for farming.

Ever since the great Dujiangyan Irrigation System was completed, the Chengdu Plain has been free     10     flooding and the people there have been living peacefully.

Mao Zedong wrote a poem in     1     he dreamed of “Walls of stone to hold back clouds and rain till a smooth lake rises in the narrow gorges”. Now his dream has come true. The power of the Yangtze River, which is the world’s third     2     (long) river, has been harnessed by the Three Gorges Dam.

The dam is nearly 200 meters high. It is the largest hydro-electric power station and dam in the world and     3     (cost) more than any other construction project in history. Sun Yat-sen,     4     was the leader of the 1911 Revolution, first suggested the ides of a dam     5     the Yangtze River in 1919. Three quarters of China’s energy is produced by burning coal. In 1993, China used 1.2 billion tons of coal for heating and generating electricity.     6     (unfortunate), burning coal causes serious air     7     (pollute) and increases global warming. The dam will generate electricity equal     8     about 40 million tons of coal without causing so much air pollution.

The Three Gorges area is one of the most beautiful     9     (area) of China and the project has flooded some of China’s most famous historical sites, including the Qu Yuan Temple, the Han Watchtower and the Moya Cliff carvings. Besides, the reservoir has flooded 2 cities. But now the people who have moved from their homes are living     10     happy new life.