There weren't some flowers.
any / number
There was a rice.
some / lots of
There was some apple.
an
There was some carrots.
were
Was there lots of pencil?
a
There wasn't a grass.
any
There wasn't any tree.
a
There were a cars.
some / number
Were there any water?
was
Were there any cheese?
was
There weren't any pollution.
wasn't
Was there a sugar?
some / lots of