Australia IS a continent. The only country in it is Australia
Australia is the only country on the continent of Australia.
Australia is the only country on the continent of Australia.
Australia is both a country and a continent
Australia is the only continent with just one country, which is Australia itself.
The only continent to contain only one country is Australia, which is both the country and the continent. Antarctica is only a continent, but does not contain any country.
Australia is an island continent. There is one country, Australia, on the continent of Australia.
Australia, it is the only continent that is also its own country.
Australia is the continent that is also a country. It is the only country to occupy an entire continent.
There are two. Western Australia and Australia.
Australia is a continent that is also a country. Located in the southern hemisphere, it is the only continent that is also a single country.
Australia is both a country and a continent. It is the only country that occupies an entire continent.