a
)
These
are
the
pieces
that
make
____________________
the
motor
of
our
design
.
b
)
The
teacher
warned
us
____________________
the
danger
of
using
that
machine
without
gloves
.
c
)
You
must
put
____________________
the
tools
after
you
have
finished
using
them
.
d
)
If
you
don't
look
____________________
a
machine
it
may
break
.
e
)
If
we
continue
to
use
so
much
oil
one
day
it
will
run
____________________
.
