one
of
the
most
important
natural
____________________
is
the
____________________
.
The
____________________
in
needed
for
the
____________________
.
That
is
because
the
____________________
is
seventy
percent
full
of
____________________
.
Also
our
____________________
is
composed
of
____________________
the
most
.
We
must
take
____________________
of
the
____________________
because
is
a
resource
that
could
be
____________________
in
the
____________________
.
