A
Caves (洞穴) have a primary appeal — they hold the secrets to our past and are mysterious in and of themselves.
● Mammoth Cave
Kentucky, USA
The longest cave system in the world lies beneath the Green River Valley in Kentucky and while over 400 miles of passageways have been mapped, it has yet to be fully discovered. The complex limestone labyrinth (石灰岩迷宫) was discovered by humans 4,000 years ago.
● Blue Grotto
Capri, Italy
Once used as the personal swimming hole for the Roman Emperor Tiberius, this extremely bright sea cave is almost 200 feet long and 82 feet wide. Its unique glow comes from the light entering the small opening to the outside.
● Avshalom Cave Nature Reserve【结束】
Beit Shemesh, Israel
Also known as the Soreq Cave Nature Reserve, Avshalom is considered to be the Rosetta Stone of climate history in the Eastern Mediterranean through the packed stalactites (钟乳石) found in the cave, some of which are over 13 feet long, and are as old as 300,000 years.
● Cave of the Crystals
Naica, Mexico
This unique cave system in Mexico contains some of the largest natural crystals (水晶) ever found—the longest of which is 39 feet long and 13 feet thick. However, it is rarely explored due to logistical difficulties: it is extremely hot due to its location above a volcanic vent, and the huge crystals block also block the passage.
21
Where does the longest cave lie in?
A. Kentucky, USA. B. Capri, Italy.
C. Beit Shemesh, Israel. D. Naica, Mexico.
22. Avshalom is famous as .
A. the most beautiful cave. B. the Soreq Cave Nature Reserve.
C. the Emperor’s swimming hole. D. over 400 miles of passageways.
23. Which cave includes the largest natural crystals?
A. Cave of the Crystals. B. Blue Grotto.
C. Mammoth Cave. D. Avshalom Cave Nature Reserve.
【答案】21. A 22. B 23. A
【解析】
这是一篇应用文。文章主要介绍了世界著名的几大洞穴。
【21题详解】
细节理解题。根据文章Mammoth Cave部分内容：Mammoth Cave, Kentucky, USA
The longest cave system in the world lies beneath the Green River Valley in Kentucky…（美国肯塔基州猛犸洞，世界上最长的洞穴系统位于肯塔基州的绿河谷下面……）可知，世界上最长 的洞穴是位于美国肯塔基州的猛犸洞穴。故选A项。
【22题详解】
细节理解题。根据文章Avshalom Cave Nature Reserve部分内容：Also known as the Soreq Cave Nature Reserve…（阿夫沙洛姆洞穴自然保护区也被称为Soreq洞穴自然保护区……）可知，阿夫沙洛姆洞穴自然保护区以被称为称为Soreq洞穴自然保护区而出名。故选B项。
【23题详解】
细节理解题。根据文章Cave of the Crystals部分内容：This unique cave system in Mexico contains some of the largest natural crystals ever found（墨西哥这个独特的洞穴系统包含了一些迄今为止发现的最大的天然水晶）可知，最大的水晶在墨西哥的水晶洞里发现。故选A项。
