What's
a
UFO
?
It's
an
unidentified
____________________
object
,
of
course
!
There
are
many
organizations
,
expressions
,
scientific
____________________
and
common
expressions
that
are
represented
by
their
initial
____________________
.
These
become
'words'
and
function
as
____________________
.
Some
of
them
are
international
,
such
as
____________________
and
FIFA
,
but
others
such
as
AIDS
____________________
from
language
to
____________________
.
These
are
many
text
message
____________________
which
are
now
common
in
everyday
____________________
,
such
as
LOL
____________________
means
laugh
out
loud
.
