Read the following text and decide the best answers to fill in the gaps.
Son Doong cave is the world's ___(1)___ cave, located in QuangBinh province,Vietnam. It was ___(2)___ by a local man named Ho Khanh in 1991 and was recently discovered in 2009 by British cavers, led by Howard Limbert. The name “SonDoong '' cave ___(3)___ “mountain river cave”. The cave was created 2-5 million years ago by river water eroding away the ___(4)___ underneath the mountain.
At about 9 kilometers in length, 200 meters in ___(5)___ and 150 meters in height, Son Doong Cave is ___(6)___ larger than Deer Cave in Malaysia and has replaced Deer Cave to take pole position ___(7)___ the world’s largest cave.