Cities
are
full
of
cars
,
there's
often
____________________
on
the
roads
.
This
often
leads
to
a
____________________
____________________
,
which
means
delays
.
The
cars
cause
____________________
,
along
with
the
____________________
from
factories
,
and
dirty
____________________
is
bad
for
our
health
.
You
can
also
hear
the
____________________
of
the
traffic
all
over
the
city
.
Cities
can
be
ugly
,
too
.
Most
of
the
____________________
has
high
-
rise
buildings
and
____________________
sidewalks
on
it
.
And
when
people
share
the
same
____________________
,
they
produce
tons
of
garbage
.
Some
people
leave
their
____________________
on
the
street
.
There's
____________________
on
some
buildings
,
and
even
if
it
looks
nice
,
business
owners
usually
don't
like
it
.
