青藏高原发现首个史前洞穴遗址

  

  A cave site containing fragile stone tools and pottery shards believed to be at least 4,000 years old was recently unearthed in Ngari Prefecture, Southwest China’s Tibet Autonomous Region. The Melong Tagphug cave site, with two caves of 1,000 square meters and 250 square meters, is situated about 4,600 meters above sea level. It is the first prehistoric cave site found on the Qinghai-Tibet Plateau.

“Besides abundant cultural relics and animal bones, ochre rock paintings with geometric patterns, human figurines, palms and the sun were also found,” said an archaeologist. 

In November, archaeologists found thousands of stone artifacts at a paleolithic site in Tibet, which shows that humans might have conquered one of the highest and most ecologically-challenging places on the globe at least 30,000 years ago.

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1.How many years has this cave site existed?

A At least 1,000 years.

B About 4,000 years.

C More than 250 years.

D 4,600 years or so.

解析：选B。细节理解题。根据第一段第一句的A cave site containing fragile stone tools and pottery shards believed to be at least 4,000 years old was recently unearthed可知该洞穴遗址据距今约有4000年的历史，故选B。

2.What's the Chinese meaning of the underlined phrase “sheds light on” in Paragraph 3?

A “突出”.

B “美化”.

C “照亮”.

D “揭示”.

解析：选D。词义猜测题。根据画线短语所在句子的语境可知，此句是在叙述该洞穴遗址被发现的意义，结合所给选项可知“揭示”最符合语境，故选D。

3.What is NOT the fact about the cave site?

A Two caves were found in the cave site.

B It is the first cave site found on the Qinghai-Tibet Plateau.

C The objects in the cave site are of great historical and artistic value.

D Its discovery can help us learn about people’s life in prehistoric times on the plateau.

解析：选B。细节理解题。根据第一段最后一句It is the first prehistoric cave site found on the Qinghai-Tibet Plateau.可知该洞穴遗址是在青藏高原上发现的首个史前时期的洞穴遗址，并非在青藏高原发现的第一个洞穴遗址，故选B。

4.Why does the author write the last paragraph?

A To move on to a new topic.

B To summarize the previous content.

C To attract the reader's attention.

D To provide some relevant supplementary information.

解析：选D。推理判断题。通读最后一段可知，此段主要介绍了在西藏地区发现的又一洞穴遗址及其发现的意义（证明人类很早就在世界屋脊上有所活动），是紧接着上文的内容（发现这个史前洞穴的意义）写的，因此作者写此段的目的是为了提供相关的补充内容，故选D。

5.What can be the best title of the passage?

A A 4,000-year-old cave site with two caves.

B A cave site unearthed by a joint archaeological team.

C The first prehistoric cave site found on the Qinghai-Tibet Plateau.

D The excavation of a cave site on the Qinghai-Tibet Plateau.

解析：选C。主旨大意题。通读全文可知，本文主要围绕首个史前洞穴遗址在青藏高原被发现而展开，故选C。