The London Underground is one of the oldest subway systems in the world.

Commuting by subway is the most convenient.

Subways are very convenient as a means of urban transportation.

My dream is to travel the world.

This is the most beautiful flower.

I am planning to go to London next week.

He ate one apple.

He is interested in the history of the past.

This old building tells the history of our town.

This old house is the one where my grandparents lived.