We
divide
the
rivers
in
Spain
into
three
groups
:
the
rivers
of
the
____________________
____________________
,
the
rivers
of
the
____________________
____________________
and
the
rivers
of
the
____________________
____________________
.
The
____________________
is
the
longest
river
in
the
Iberian
Peninsula
.
The
____________________
is
the
longest
river
that
is
completely
within
Spain
.
The
____________________
forms
part
of
the
border
between
____________________
and
Portugal
;
the
____________________
forms
another
part
of
this
border
.
In
northern
Spain
there
are
drowned
river
valleys
called
____________________
.
