What's this?
This is a swimming pool.
What's this?
This is a library.
What are these?
These are taxis.
What are these?
These are motorbikes (and cars).
What are these?
These are bikes.
What's this?
This is a castle.
What's this?
This is a museum.
What's this?
This is a restaurant.
What are these?
These are planes.
What's this?
This is a hospital.
What's this?
This is a station.
What's this?
This is a train.