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Hoh Xil was recognized by the UNESCO World Heritage Committee as a new world natural heritage site in Poland on July 7, 2017. And it became the largest one in China with a vast area of 45,000 square kilometres.

Hoh Xil, which means "beautiful girl" in Mongolian, is located in the northeastern part of the Qinghai-Tibetan Plateau which was listed as the largest and highest plateau in the world. Hoh Xil has an average elevation of 4,600 meters above sea level. It is one of the major headwater sources of the Yangtze River. And it drainages to many isolated lakes too.

Hoh Xil National Nature Reserve is China's largest and the world's third largest area with no people to live. Because of the high altitude(海拔) and fierce weather, it is impossible for people to live there. Therefore, it is the paradise for wildlife and home to more than 230 species of wild animals including endangered(濒临灭绝的) species such as the Tibetan antelope, and it includes several migration routes of the species.

Tibetan antelope is part of the IUCN Global Species Program, and recognized as the National Class I Protected animal. In 1997, the first National Nature Reserve established to protect Tibetan antelope was created in Hoh Xil. Around 60,000 Tibetan antelope currently live freely in Hoh Xil National Nature Reserve. The project of world heritage application was started at the end of 2014 and it took two and a half years to improve Hoh Xil Nature Reserve.Hoh Xil was recognized by the UNESCO World Heritage Committee as a new world natural heritage site in Poland on July 7, 2017. And it became the largest one in China with a vast area of 45,000 square kilometres.

1.What does the underlined word “vast” mean?

A Large.

B High.

C Lonely.

D Beautiful.

解析：选A。词义猜测题。根据其所在句子And it became the largest one in China with a vast area of 45,000 square kilometres.可知可可西里是中国最大的自然保护区，其面积高达45000平方公里，因此vast意思是“大、巨大”，故选A。

2.What does Hoh Xil mean in Mongolian?

A High Plateau.

B Beautiful girl.

C An area without people.

D Heaven to animals.

解析：选B。细节理解题。根据第二段第一句Hoh Xil, which means "beautiful girl" in Mongolian...可知可可西里在蒙古语中的意思是“美丽的女孩”，故选B。

3.Which of the following statements is TRUE?

A Hoh Xil is rich in water supply.

B Hoh Xil is beautiful and good to live in.

C There are 230 endangered species in Hoh Xil.

D Tibetan antelope live in the same place the whole life.

解析：选A。推理理解题。根据第二段最后两句It is one of the major headwater sources of the Yangtze River. And it drainage to many isolated lakes too.可知可可西里是长江主要水源，其还能为很多内流湖泊供水，因此可可西里的水源丰富，故选A。

4.Why was the Hoh Xil National Nature Reserve established in 1997?

A To change it into the paradise for animals.

B To improve the Hoh Xil Nature Reserve.

C To prepare for the world heritage application.

D To protect the Tibetan antelope.

解析：选D。细节理解题。根据最后一段第二句In 1997, the first National Nature Reserve established to protect Tibetan antelope was created in Hoh Xil. 可知1997年设立可可西里自然保护区是为了保护藏羚羊，故选D。

5.When did the world heritage application begin?

A In 2012.

B In 2013.

C In 2014.

D In 2017.

解析：选C。细节理解题。根据最后一段最后一句The project of world heritage application was started at the end of 2014 and it took two and a half years to improve Hoh Xil Nature Reserve.可知可可西里申遗是2014年开始的，故选C。