Eleven European countries adopted a common currency, the euro.
The Euro has been adopted in some European countries as a common currency.
The euro is a unique currency to one country.
The sky darkened as the sun set.
The boy was a little worried about you.
Some men are fishing on the sea.
A man is playing the guitar.
An elderly woman sits contently in a chair as she rests her foot on her walker.
The air contains a person on skis.