His grandfather fought in the Second World War.

Esperanto is one of the most famous international auxiliary languages.

He is interested in the history of the Old World.

We all wish for world peace.

The one-eyed goblin was dancing in the forest.

Please teach me how to find the greatest common divisor.

New World monkeys live in South America.

The World Health Organization is working to improve public health worldwide.

The World Trade Organization is an important organization that sets the rules for international trade.

Old World monkeys primarily inhabit Africa and Asia.