My father is forty-one years old.

This city with its beautiful night view is my favorite.

The moon has risen, and it's time to return the robe of night.

She is conducting research on the world's oldest profession.

Old World monkeys primarily inhabit Africa and Asia.

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

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

New World monkeys live in South America.

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

He solved the problem in a scientific way.