The Vikings, a group of people    1    ancestors came from Scandinavia, were the first Europeans    2    (reach) America. In 982 AD, there were 10,000 Vikings    3    (live) in Iceland. According    4    the old stories, Eric the Red was forced to leave Iceland because he had committed    5    murder, for which he got into trouble. He reached Greenland and then returned to Iceland and told people about Greenland. Later, he set sail again, with 25 ships, of which only 14 made    6    to Greenland. A man called Biarni was hoping to join his father who was with Eric, but he was blown off course and found himself in an    7    (know) land that no humans seemed to have stepped on, from where he reached Greenland. In 1002, Eric the Red’s son Leif followed Biarni’s directions and sailed to what is believed to be the coast of present-day Canada. He then sailed    8    (far) south to an island now known as Newfoundland. We know about their deeds through stories which    9    (write) down centuries later in Norway and Iceland. They are the first    10    (record) we have of Europeans sailing to the America.

The celebrations with the military parade for China's 70th anniversary（周年纪念日）on National Day have clearly shown     1     this nation has developed quickly with confidence in the system     2     (adopt) under the leadership of the Communist Party of China (CPC).

On the one hand, National Day     3     (say) that China at 70 has achieved scientific and technological developments. On the other hand, it also reminded     4     (we) of the suffering the country experienced after the Opium War of 1840.

The parade also told the     5     (story) of "Made in China" and "Created in China". The achievements did not fall     6     the sky and nor were they stolen. Instead, they were the result of the hard work,    7    (wise) and courage of the Chinese people.

Under the leadership of the CPC, the Chinese people have created     8     miracle in 70 years. The truth of socialism with Chinese characteristics     9     (prove) by history and practice to be a correct path. It has become evident that China will     10     （sure）achieve the goal of the great renewal of the Chinese nation.

From 1405 to 1433, Zheng He made seven historic voyages to Asia and Africa. Thanks to frequent friendly     1     (exchange) between China and foreign countries, Zheng He successfully     2     （promote）friendship between China and Southeast Asian countries to new heights. From 1403 to 1424, the number of envoys（使者）visit China a record 318 times,     3     average of 15 times a year.

Zheng He’s fleet traveled from the Western Pacific through the Indian Ocean to West Asia and the east coast of Africa,     4     （involve） three oceans and providing valuable records for the history of Chinese navigation（航海）. His voyages,     5     happened earlier than the Westerners’ Voyages of Discovery, came 87 years before Columbus, 92 years before Vasco da Gama, and 116 years before Magellan’s     6     （arrive） in the Philippines.

Sadly, many of the official Chinese records of these voyages were destroyed     7     his death. Zheng He’s rightful place in Chinese history     8     （confirm） by Deng Xiaoping in 1984. Following a more realistic evaluation of Zheng He’s achievements by scholars East and West, his standing as one of the     9     (great) maritime explorers of all time has at last been     10     (firm) recognized worldwide.

4 . RMS Titanic was a British ship that sank (沉没) in the North Atlantic Ocean in the early morning hours of April 15,1912. There were about 2,224 people aboard the ship, more than 1,500 of    1    died, making it one of the    2    (bad) ocean disasters in modern history.

So far the ship    3    (rest) on the ocean floor for more than a century. In 2012 the first curious tourists were brought to it and saw the ship themselves. Now people will once again get the chance    4    (visit) the Titanic. This could be one of the last    5    (chance). A 2016 study showed that a bacteria (细菌) could eat away what    6    (leave) of the famous ship inside 15 or 20 years.

The eight-day journey will transport visitors in an undersea boat    7    the final resting place of the Titanic. The first trip is already    8    (full) booked, though the experience costs 105,129 dollars per person. Visitors will have a great time around the vast field where the Titanic rests, home to    9    great many ancient treasures,    10    (remain) untouched for over a century.

At the beginning, written Chinese was a picture-based language. It dates back several thousand years to the use of animal bones and shells on which symbols    1    ( carve) by ancient Chinese people. Some of the ancient symbols can still be seen in today’s hanzi.

By the Shang Dynasty, these symbols    2    (become) a well-developed writing system. Over the years, the system developed into different forms，as it was a time when people were divided geographically,    3    (lead) to many varieties of dialects characters. This,    4    , changed under the rule of Emperor Qinshihuang of the Qin Dynasty.

Emperor Qinshihuang made the seven major states into one    5    ( unite) country where the Chinese writing system began to develop in one direction. That writing system was    6    great importance in uniting the Chinese people and culture. Even today, no matter where Chinese people live or    7    dialect they speak, they can all still communicate    8    (easy) in writing.

Written Chinese has also become an important means by    9    China’s present is connected with its past. People in modern times can read the classic    10    (work) which were written by Chinese in ancient times. The high regard for the Chinese writing system can be seen in the development of Chinese characters as an art form, known as Chinese calligraphy, which has become an important part of Chinese culture.

Six “sacrificial pits” (献祭深坑)，    1    （date）back to 3,200 to 4,000 years, were discovered in Sangxingdui site on March 20th. Over 500 artifacts     2     (unearth) from the site. Among them was a gold mark, found at the No.5 pit, with     3     area of about three square meters,     4     was the smallest pit, according to archaeologists.

Sangxingdui site, first found in 1929, is generally considered as one of the     5     (value) archaeological sites along the Yangtze River. However, the large-scale excavation (挖掘) on the site only began in 1986, when two pits widely     6    (believe) for sacrificial ceremonies were accidentally discovered.

    7     the digging process, archaeologists made full use of modern scientific and technological means     8     (build) an archaeological excavation cabin.

So far, archaeologists have dug out     9     (variety) of cultural items from four of the pits. The rest of the     10     (new) discovered pits are still under excavation.

Aspirin, invented in 1897, has its    1     (original) in a kind of tea    2    (possess) a chemical to relieve pains and fever and has the potential to reduce the risk of heart attacks by improving the     3     (circulate) of blood. It was in 1899 that it was tried out    4    patients. In 1900, aspirin took the shape of tablets, becoming the best selling medicine.

More effects of aspirin were discovered, such as reducing the risk of cancer, avoiding strokes,     5    (extend) people's lives and aiding people with diabetes.

Penicillin, discovered by Alexander Flemming in 1928, is considered to be the most vital medicine in contemporary society. It can    6    ( apply ) to the treatment of illnesses caused by bacteria. It was not until 1940 when penicillin was made pure enough to work as a medicine    7     it     8     ( produce) in large quantities, which led to its wide distribution in World War II with the acceleration of the government's approval. Thus many lives who    9     (die) were saved.

Nobel Prize in Medicine was awarded to the scientists devoted to the    10    (apply) of penicillin.

Because this was Li Qiang's first trip, he was worried and     1    （settle）so that he suffered from "time lag".     2    （hit）by a lack of fresh air, his head ached. His guide gave him some green tablets and a mask which helped him solve the problems. However, he experienced something new.     3    （arrive）home, he was shown into a large, bright clean room     4     a wall of trees.     5    （exhaust）, he slide into bed and fell fast asleep.

Wales was linked to it in the thirteenth century. Now when people refer to England you find Wales     6    （include）as well. Next England and Wales     7    （join）to Scotland and the name was changed to "Great Britain".     8    （happy）this was accomplished without conflict. Finally the English government tried to form the United Kingdom by getting Ireland connected in the same peaceful way. However, the southern part of Ireland was     9    （willing）and broke     10     to form its own government.