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.

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.

At 3:42 a.m. everything began to shake.     1     seemed as if the world was at an end! Eleven kilometers directly below the city one of the greatest     2     (earthquake) of the 20^th century had begun. It was felt in Beijing,     3     is more than two hundred kilometers away. One–third of the nation felt it. A huge crack that was eight kilometers long and thirty metres wide cut across houses, roads and canals. Steam burst from holes in the ground. Hard hills of rock became rivers of     4     (dirty). In 15 terrible seconds a large city     5     (lie) in ruins. The     6     (suffer) of the people was extreme. Two-thirds of the people died or     7     (injure) during the earthquake. Thousands of families were killed and many children were left     8     parents. The number of people     9     were killed or     10     (serious) injured reached more than 400,000.

One important early rail line was the Beijing-Zhangjiakou line,     1     (complete) in 1909. Other rail lines then under development used Western financing and assistance,     2       Zhangjiakou was an important trading post with Russia and the Chinese government felt the line was a high priority, so it decided that construction should be all Chinese. Hence, Zhan Tianyou     3     (give) this important job. When he was 12, he was sent by the government to study in the US,     4     he graduated from high school and Yale University. On his return to China, he gained experience     5     (work) on the railroad between Beijing and Shenyang, before being given the    6     (responsible) of building the Beijing-Zhangjiakou line. Through his skill, the railroad was finished two years ahead of schedule.

    7     (unfortunate), development of the Chinese rail networks     8     (be) soon stalled by war.

In the 1950s, the government began    9     renewed push to develop the networks, repairing damaged lines, filling in the gaps and lengthening lines still     10     (far) so that most of the major cities would be connected.

In the second half of the eighteenth century, there was     1    important change in society. This change    2    (call)the“Industrial Revolution”. With the Industrial Revolution, factories appeared and mass production became possible because of     3     (invent) such as the steam engine,     4    was invented by James Watt in 1769. At first the steam engine was used in mines,     5    soon it was used in factories and on the railways.

Thousands of people left the countryside    6     (work)in the city and the population of towns and cities     7    (great)increased. Factory owners became    8    (power) than land owners. From 1830    9    the early 20th century, the Industrial Revolution     10     (spread) through Europe and the US and then to other countries.