what's this?
It's a new boat
what are those?
They're old boats
what are those?
They're fast cars
what's this?
It's an old bus
what are these?
They're small trucks
what are these?
They're nosiy cars
what's that?
It's a short train
what's this?
It's a long train
what are these?
They're new buses
what are those?
They're big trusks
what's that?
It's a small truck