The Amber Room, one of the greatest     1     (wonder) of the world, was a great work that took about ten years     2     (make). In 1716, the Amber Room was given to the Russian people as a gift of friendship by William I, who loved soldiers more     3     the Amber Rootn itself. In Russia, the room first served as a small reception hall for     4     (importance) visitors,     5     later was moved and redesigned by Catherine II.     6     (fortunate), the Amber Room disappeared when the Nazi Germans and Russia were at war and until now nobody knows     7    happened to it. In 2003, however, a new Amber Room     8     (build)by the Russians and Germans on the basis of the old photos     9    (be) ready for the people of St Petersburg when they celebrated the 300th birthday of     10    (they) city.

A clay pig     1     (find) in Lianhe Ruins in Sichuan province in 2019. It is estimated to be about 3,000 years old.     2     makes this finding unusual is its adorable appearance. The clay pig looks exactly like the green pig from The Angry Birds movie.     3     (it) cute image has left the Chinese netizens surprised and delighted, with many people joking that The Angry Birds character has traveled back in time to prehistoric days. The topic     4     (attract) 400 million views and 290,000 discussions since the pig was discovered.

How Dolly was born

Professor Wilmut's experiment involved three adult female sheep. He first     1     (take) a cell from sheep A, He then implanted (植入) the genetic information into     2     (it) nucleus (细胞核) with an egg cell from sheep B, whose nucleus had been removed. Tiny electric shocks     3     (use) to stimulate ( 激 发 ) this new “combination” egg cell to divide.     4     (final), the new embryo was implanted into the body of sheep C, where it developed just like any other sheep embryo.

In 1996, his determination and     5     (patient) paid off. Dolly became the first sheep to be born without a father and was also the first genetically     6     (identity) copy of an adult. As the egg cell gradually splits, its millions     7     offspring cells specialize into muscle cells or skin cells, for example,     8     (mouse) and cattle have now also been cloned from an adult. These clones have also been cloned, producing three generations of healthy clones.

    9     was thought that a specialized cell could never become a different cell, with all the genetic instructions     10     (form) the entire creature.

A great    1    (achieve) was made in 1953. Edmund Hillary and Tenzing Norgay climbed to the top of Mount Everest    2    (successful) at 11: 30 am, on May 29. They became the first people    3    (reach)the peak of Mount Everest.

Edmund Hillary was a New Zealand mountaineer, explorer and philanthropist, and Tenzing Norgay was a Nepali-Indian Sherpa mountaineer. Both of them were part of the    4    (nine) British expedition(探险)to Everest    5    (lead) by John Hunt in 1953. For this expedition, Hunt selected a group of people who were    6    (experience) in climbing mountains. In the group, Edmund Hillary    7    (select) from New Zealand, and Tenzing Norgay was actually from India where he lived. Before climbing, the expedition had been organized and planned for months. They made 9 camps on their way up, some of    8    have been still used by climbers up to now The first team made    9    to the place which was just 300 feet below the peak, and they left on May 26. They actually had already reached the point that no man had reached before. They were forced to leave because of the bad weather and besides, there were problems    10    their oxygen tank, too.

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.

In the closing ceremony of the 2018 0lympic Winter Games. China put on "See You in Beijing in 2022", directed by Zhang Yimou. The show centered on the talents of a team of 24 roller-skating     1    (perform) from Beijing Sport University. Two of them    2    (dress) as "Panda Captains" led the performance. The performance reviewed China's ancient times,     3    (show) the country's rich cultural heritage (遗产)and singing about the present. as well as the future that     4    (lie) ahead.

In addition to traditional symbols including the Great Wall and lucky animals    5    the Chinese dragon and the Chinese phoenix, the performance also showed China's recent engineering and    6    (technology) achievements. Towards the end of the performance, the Olympic rings     7    (rise) on the stage, as well as images of a global village, children's smiling faces, olive branches and plum blossoms(梅花),    8    stood for China's promise to promote global peace and building a better future for mankind. Finally, the skaters travelled a path on ice     9    (draw) the “Winter Dream" sign of the Olympic Winter Games Beijing 2022. The performance     10    (successful) sent Chinese people's goodwill and invitations to the world for Beijing 2022.

The Amber Room was made of several tons of amber. The amber which    1    (select ) had a beautiful yellow-brown colour like honey. The design of the room was in the fancy style popular in those days. It was also a treasure decorated with gold and jewels,     2    took the country's best artists about ten years     3     (make).

The Amber Room was designed for the palace of Frederick I.     4    , the next King of Prussia Frederick William I, to whom the Amber Room belonged, decided not to keep it. In 1716 he gave     5     to Peter the Great.     6     return, the Czar sent him a troop of his best soldiers. So the Amber Room became part of the Czars winter palace in St Petersburg.

Later, Catherine II had the Amber Room     7    (move )to a palace outside St Petersburg where she spent her summers. She told her artists to add more details to it. In 1770 the room was completed the way she wanted. Almost six hundred candles lit the room and its mirrors and pictures shone like gold.    8    (lucky), although the Amber Room was considered one of the    9     (wonder)of the world, it is now    10    (miss).

When digging outside the city walls, researchers     1     (discover) thirty to forty bodies lying one on top of another. They had been murdered.

The men dug with great care, trying not to disturb the       2    (evident) of what had happened. Everyone was curious     3    why all these people had been killed at the same time. Was it just     4     coincidence?

Deep in the ground below the bodies, they found a tomb     5     was made of stone. It contained many valuable things,     6     (include) much gold and many jewels. Inside it lay the body of a man that was     7     (good) preserved. It was clear that the man had been a king,     8     explained why the other bodies were there. The workers who had built the tomb were killed shortly after the king     9     (die). That was because they wanted to keep the tomb a secret, and to make     10     (they) companions for him in death.

9 . The Battle of Chancellorsville, one of the most famous battles of the Civil War, took place in Virginia in the spring of 1863. For months, the two armies had been staying on opposite banks of a narrow river. The Confederate(南方联盟) troops were led by perhaps     1     (honored) military tactician(战略家) in American history, General Robert E. Lee. The Union (北方联盟)soldiers were led by “Fighting” Joe Hooker.

In appearance, personality, and lifestyle, these men were nearly perfect opposites. Lee, an older man in poor health with a gray beard, had a solemn, measured character. Hooker was a blond, broad-shouldered young man     2     pride over his appearance was but one aspect of his self-centeredness. Whereas Lee was loyal and principled, Hooker was known for his rollicking enjoyment of both women and whiskey.

Despite the fact that the Confederacy     3     (win) the last four major battles and the Union soldiers were starving,     4     (exhaust), and demoralized, Hooker proclaimed, “My plans are perfect. And when I start to carry them out,     5     God have mercy on Bobby Lee, for I shall have none.” Why was Hooker so confident?

Hooker had used spies, analysts, and even hot air balloons to compile a vast amount of intelligence about Lee’s army. He had already been aware, for example,     6     Lee had only 61,000 men to Hooker’s own 134,000. Supported by his superior numbers, Hooker secretly moved 70,000 of his men fifteen miles up and across the river, and then ordered them to sneak back down to position themselves     7     Lee’s army. In effect, Hooker had cut off the Confederate soldiers in front and behind. They were trapped. Satisfied with his advantage, Hooker became convinced that Lee’s only option was to retreat to Richmond, thus     8     (assure) a Union victory.

Yet Lee, despite his disadvantages of both numbers and position, did not retreat. Instead, he moved his troops into position to attack. Union soldiers who tried to warn Hooker that Lee was on the offensive     9     (dismiss) as cowards. Having become convinced that Lee had no choice but     10     (retreat), Hooker began to ignore reality. When Lee’s army attacked the Union soldiers at 5:00 p.m., they were eating supper, completely unprepared for battle. They abandoned their rifles and fled as Lee’s troops came shrieking out of the brush, bayonets drawn. Against all odds, Lee won the Battle of Chancellorsville, and Hooker’s forces withdrew in defeat.

Woodblock printing first appeared in the early Tang period. During the Song dynasty, the technique of block printing was very advanced. Books were     1    (beautiful) printed. Even today the books     2    (print) at the time are valuable and treasured by libraries and book collectors.

However, block printing     3    (be) not very convenient. Every two pages of a book had to be carved on a woodblock, and a big book would require many blocks. Besides, there had to be large places for storing the books.     4     (overcome) these shortcomings, Bi Sheng invented the movable type during the years between 1041 and 1048. One word was carved on one piece of clay,     5     was hardened with fire. Then clay characters were set on     6     iron plate according to the text of a book. Then ink was applied to them and     7    (sheet) of paper spread over them, and the printing was done. Bi Sheng’s invention made printing faster and     8    (easy) than before. Later, movable type of metal and wood was made and widely used.

The technique of printing was gradually known to other Asian countries and Europe. The great influence printing had     9    the advance of civilization is too clear to need any     10    (explain).