Look
at
all
of
that
snow
.
It
____________________
be
really
cold
outside
.
The
ground
was
wet
this
morning
.
It
____________________
have
rained
last
night
.
Dinosaurs
were
very
big
,
they
____________________
have
eaten
a
lot
.
It's
five
in
the
morning
and
you
still
haven't
gone
to
bed
?
You
____________________
be
tired
!
You
____________________
use
your
smartphone
while
you
are
driving
.
You
____________________
get
on
the
subway
if
you
haven't
paid
for
the
ride
.
You
____________________
not
open
the
gift
until
it
is
your
birthday
.
