1
The
Earth's
____________________
is
changing
.
For
example
,
there
are
many
more
____________________
than
twenty
years
ago
.
2
At
low
____________________
,
you
can
walk
to
one
of
the
small
____________________
islands
.
3
This
is
the
biggest
____________________
in
this
mountain
range
.
It
?
s
a
____________________
hike
to
the
top
,
around
seven
hours
.
4
The
rivers
which
____________________
through
this
area
are
all
very
____________________
and
dangerous
.
5
This
____________________
isn't
active
?
it
hasn't
____________________
for
two
centuries
now
.
