We
use
the
____________________
to
lift
objects
.
A
____________________
need
human
force
to
function
.
A
telephone
needs
____________________
to
function
.
Aeroplanes
are
used
for
____________________
.
Computers
are
used
for
____________________
.
An
electronic
circuit
have
____________________
.
We
use
ramps
to
____________________
things
up
.
