What's this? (old)
It's an old bus.
What are those? (new)
They’re new buses.
What are those? (slow)
They’re slow boats.
What are those? (new)
Those are new bikes
What’s that? (small)
It’s a small truck
What are these? (short)
They’re short trains.
What are these? (big)
They’re big trucks.
What are these? (short)
They are short pencils
What’s this? (fast)
It’s a fast boat.
What's that? (fast)
That's a fast plane
What’s this? (long)
It's a long train