Read the text and fill in the gaps with the right phrases.

The Great Barrier Reef is one of the ... . It is the world's largest ... .
Captain James Cook ... in 1770. ... when his ship ran aground on the reef whilst he was charting the eastern coast of Australia.
The Great Barrier Reef lies off the north-eastern coast of Australia. It is located in the Coral Sea, in the south Pacific Ocean and ... .
The Great Barrier Reef is around 18 million years old. There are ... living in the Great Barrier Reef.