This washing machine is environmentally friendly because it uses _______ water and electricity than _______ models．

less;

older

less;

elder

fewer;

older

fewer;

elder

This washing machine is environmentally friendly because it uses ________ water and electricity than ________ models．

less; older

less; elder

fewer; older

fewer; elder

This washing machine is environmentally friendly because it uses ________ water and electricity than ________ models．

less; older

less; elder

fewer; older

fewer; elder