1 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

The main structure of the Datengxia water resources management facility in Southwest China has been completed four months ahead     1     schedule, the Ministry of Water Resources said on Saturday.

The project,     2     is located in the Xijiang River, has eight power generation     3     (unit), each with an installed capacity of 200,000 kilowatts (千瓦). It can     4     (annual) generate more than 6 billion kilowatt hours of electricity.

In cooperation with other reservoirs (水库), the project can help Wuzhou, a city with     5     population of over 2.8 million in Guangxi, deal with once-in-a-hundred-year floods. Previously, the city was only able to hold floods that occur once every 50 years. The project also enables some cities in the Pearl River Delta     6     (resist) floods that happen once every two centuries.

The ministry said the Datengxia facility will also provide strong support for rural development, offering irrigation (灌溉) water to 80,000 hectares of farmland and     7     (address) drinking water shortage for almost 1.4 million people in Guangxi.

The project has already played     8     (significance) roles in the past three years when it was put into trial operation. For example, in June last year, it helped prevent     9     store about 700 million cubic meters of floodwater when the Xijiang River     10     (hit) by a flood. In the peak, it reduced water flow by 3,500 cubic meters per second.

Lushan National Park, in the south of Jiujiang City, Jiangxi Province, is a well-known tourist attraction both in China and abroad. It has appealed     1     countless visitors on account of its natural views and cultural relics.

The national park covers an area of 500 square kilometers and has more than 90 mountain peaks (山峰). The tallest one of these is Hanyang Peak which has a     2     (high) of 1,473.4 meters. The park-owes its reputation to its     3     (wonder), elegant and impressive highlights such as waterfalls and rocks. There are 12 main scenic areas, together with 37 attractions. The major     4     (spot) include Wulao Feng, Sandie Spring, etc.

Wulao Feng,       5     is located in the southeast of Lushan, is 1,436 meters above sea level. Its five parallel mountain peaks once formed a single one, and standing on the top, you will     6     (reward) with an amazing view of the distant mountains, trees, lakes, and a seemingly endless sky.

Sandie Spring     7     (lie)below Wulao Feng and drops through three rough tiers (层) with a fall of 155 meters. The upper part is like snow     8     (fall) down to the pond; the middle reach wanders and twists, dancing in the air;the lower level looks like a dragon running in the pond. This is thought     9     (be) the best of the Lushan waterfalls. It is said that you are not     10     true visitor here if you miss Sandie Spring.

China’s First National Park

China’s first national park in Northwest of China’s Sanjiangyuan area,     1     (cover)a total area of 123,100 square kilometers, was officially established in 2020     2     schedule. The national park is the country’s calling card, and unlike nature reserves,     3     protect unique species, national parks stress the protection of the entire ecosystem.

Under the national park management, herders and     4     (farmer) will be turned into the forces of     5     (environment) protection in the Sanjiangyuan area. The work     6     (expect) to provide jobs, boost incomes and give people an     7     (encourage) to protect the environment. The ecological environment of the Sanjiangyuan area has greatly improved in recent years. The grassland coverage of the area has risen sharply     8     (compare) with the last decade. The last decade also saw a significant increase in the number of wild animals, because the number of Tibetan antelopes     9     (be) over 70,000 from less than 20,000 in     10     1980s.

8 . The ruins of a huge Maya city have been discovered in Guatemala with the help of the remote sensing technique LiDAR, according to the National Geographic on Thursday.

This breakthrough was possible thanks to LiDAR sensors, which can survey landscapes in 3D by reflecting laser pulses off the ground from unmanned air vehicles and others. LiDAR is exceptionally useful for detecting archeological sites (考古遗址), as it gets through jungles and other features that hold up exploration on the ground. The technique has been the activator (催化剂) of many discoveries in recent years. For instance, major finds at Angkor, Cambodia and Caracol, Belize can explain what it did.

This large lost city envelops sites like Tikal, Holmul, and Witzna—known for their temples and pyramids—but shows that these famous heritage areas are the tip of the iceberg of this lost urban network.

Hidden under the jungles of the Maya Biosphere Reserve, more than 60,000 human-made features—homes, canals, highways, some of which can even reach the modernized standard—have been identified by an international cooperation of researchers headed by the PACUNAM Foundation, a Maya cultural and natural heritage organization. Those have experts rethinking the outlines and complexity of the Maya empire.

These ancient peoples obviously established these imaginative cultures based on their known relics, but the new research has shown that the scale of this lost society is far beyond what experts had imagined. The findings will be explored in an hour-long documentary called Lost Treasures of the Maya Snake Kings, premiering (首映) Tuesday, February 6 on the National Geographic Channel.

“There are entire cities we didn’t know about now showing up in the survey data,” said Francisco Belli, one of the lead archeologists on the project. “There are 20,000 square kilometres more to be explored and there are going to be hundreds of cities there that we don’t know about, and we will push the frontiers,” he added.

The Xi’an City Wall is the most complete city wall that has survived China’s long history. It     1     (build) originally to protect the city     2     the Tang dynasty and has now been completely restored (修复). It is possible       3     (walk) or bike the entire 14 kilometers.

We accessed the wall through the South Gate. The wall is 12 meters high and from here you can see streams of people moving inside and outside the City Wall.

After     4     (spend) some time looking at all the defensive equipment at the wall, we decided it was time for some action and what     5     (good) than to ride on a piece of history!

We     6     (hire) our bikes from the rental place at the South Gate. My bike was old and shaky     7     did the job. It took us about 3 hours to go all     8     way around the Xi’an City Wall. Supposedly you can do it in two hours, but we stopped at the different gates and     9     (watchtower) to take pictures or just to watch the local people going about their     10     (day) routines.

10 . Located in the southeast of Canada and with a population of approximately 6 million, Toronto is a big and beautiful city, which has developed from a relatively unknown place over the past half century to the center of culture, trade and communication in Canada.

With its colorful ethnic mix, rich history and breathtaking buildings. Toronto offers non-stop adventures to the tourists. To get a sense of how big, various and magical Toronto is, the best place to start is the CN Tower. From this point, visitors can get a bird's-eye view of the city's amazing scenery and unique geography.

In addition to being an important center of culture, trade and communication in Canada, Toronto is also a major muti-ethnic city. It is the most populous city in Canada and its citizens come from countries around the world and from different kinds of ethnic backgrounds. Every day, in most places of the city, a hundred different languages can be heard on the streets, from Hindi to Greek to French. This, perhaps, explains why former Prime Minister Pierre Trudeau once said that Canada is a mosaic（嵌合体）of cultures and languages rather than a melting pot.

Street signs in Toronto are mostly in English. Weekly and daily newspapers are published in various languages, and the city hosts the successful international film festival each September. It is also home to a popular baseball team the Toronto Blue Jays. Toronto has something for everyone.

Moreover, Toronto has been rated one of the most livable cities in the world by United Nations Human Settlements Programme for many years. At the same time, Toronto is one of the safest, richest cities in the world with the highest standard of living.