I wish I could play the piano.
The universe is nearly 14 billion years old.
A: I'm reading a great book at the moment. B: Really? What's the book about?
I usually get to work on foot and then come home on the bus.
Simon is probably the best rugby player in the county.
Excuse me, where's the bathroom?
The dove is a symbol of peace in any different cultures.
It refers to a whole group of things
It is with a superlative adjective
It has been already mentioned
It refers to a musical instrument
It refers to a system or service
There is only one in the context
There is only one