Câu hỏi trắc nghiệm (5 câu):
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Câu 1:
Son Doong Cave Located in the limestone mountains of Phong Nha - Ke Bang National Park. Son Doong Cave was first found in 1991 by Ho Khanh, a local man. In 2009, the cave was explored and published by a group of scientists from British Cave Research Association. Son Doong Cave was formed from 2 to 5 million years ago, when the river flowed through the limestone mountain area and was buried. The water eroded limestone and created an underground tunnel. In soft limestone areas, the collapse of tunnel ceiling formed large holes which became giant domes afterward. The cave is about 200m high, 200m wide and at least 8 5km long. Especially, Son Doong consists of two entrances, which is unique among explored caves in Phong Nha - Ke Bang National Park. Exploring the cave, visitors were surprised with spectacular scenery of numerous stalactites of which some giant stalagmites are more than 70 metres high. Deep inside the cave exists a grandiose tropical jungle called “Garden of Eden" by the explorers. The jungle is home to a diversifiedsystem of fauna and flora. Besides, the cave possesses a 2.5-kilometre underground river. Not far from the “Garden of Eden” lies an enormous “pearl collection” consisting of tens of thousands of small stone pieces in dry ponds, contributing to magnificent beauty of the cave.The reason why Son Doong Cave was formed is that_______
- A. an underground tunnel was buried in the area
- B. the limestone areas were soft
- C. it only happened from 2 to 5 million years ago
- D. the river was buried in the limestone mountains
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- A. the biodiversity
- B. giant stalagmites
- C. the biggest length
- D. the river below
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- A. “pearl collection” contains a lot of precious stones
- B. tunnels and giant domes were formed at the same time
- C. we can live the cave with the air and water
- D. “Garden of Eden” is in the underground river
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- A. tropical jungle inside with the biodiversity
- B. spectacular scenery of numerous stalactites and stalagmites
- C. a river flowing over 2.5 kilometers along the cave
- D. the big sizes of the cave and the giant domes
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Câu 5:
The thing that makes it different from other caves in Phong Nha – Ke Bang National Park is______
- A. stalactites and stalagmites
- B. the two entrances into the
- C. its discovery by a local man
- D. large holes in the ceiling
