[LỚP 9] UNIT 8_READING REVISION

Son Doong Cave is "được công nhận" as the largest cave in the world by BCRA.

"Giấy phép" are now required to access the cave.

Permits are made available "với số lượng ít".

Heavy rain also makes the cave largely "không đi vào được".

Son Doong Cave became "được biết đến khắp thế giới" in 2009 thanks to British cavers, led by Howard Limbert.

The cave contains some of the tallest known "cây măng đá" in the world - up to 70 metres tall.

Heavy rains cause "mực nước sông" to rise.

River water "làm mòn" the limestone underneath the mountain.

In August 2013, the first tourist group explored the cave on a "tour có hướng dẫn viên".

ABC aired a "chương trình trực tiếp" called "Good Moring America" in May 2015.