There is a ....
mango
marshmallow
melon
There are .... beans.
some
a
any
There aren't any ....
sausages
sausage
There isn't .... cheese.
some
any
a
There .... any juice.
isn't
aren't
are
is
There are some ...
fries
grapes
carrots
There ... some grapes.
are
is
There isn't .... chicken.
any
a
some
There's ... egg.
any
some
an
a
There .... pear.
are some
is a