The world`s largest pink diamond mine, Argyle mine, has announced to shut down its operation after ______________ of business operation.

The world`s largest pink diamond mine, Argyle mine, has announced to shut down its operation after ______________ of business operation.

Explanation

The world`s largest pink diamond mine, Argyle mine, has announced to shut down its operation after 40 years of business operation. The mine is based in Australia.

The world`s larges pink diamond mine, Argyle mine, in the remote Kimberley region of western Australia, has announced that it is shutting down its business, after 40 years of a successful operation.