1
.
Some
people
have
a
feeling
of
tiredness
,
a
lack
of
energy
,
and
sudden
____________________
____________________
.
2
.
You
may
be
suffering
from
Seasonal
Affective
____________________
3
.
Studies
have
shown
that
when
there
?
s
less
sunlight
,
our
bodies
produce
more
of
a
____________________
called
?
melatonin
?
.
4
.
SAD
often
improves
and
disappears
in
the
spring
and
summer
,
which
is
why
it
?
s
also
known
as
?
winter
____________________
.
5
.
Experts
estimate
that
between
three
and
twenty
percent
of
people
in
the
UK
____________________
____________________
SAD
.
