THIS NEW MODEL NOT ONLY SAVES TIME BUT ALSO ________ OPERATING ON...

18. - DE THI THU THPT QUOC GIA MON TIENG ANH THANG 4 2016 SO GD DT HA NOI CO DAP AN
DE THI THU THPT QUOC GIA MON TIENG ANH THANG 4 2016 SO GD DT HA NOI CO DAP AN
18. This new model not only saves time but also ________ operating on two batteries instead of four.A. saving energy B. save energy C. saves energy D. to save energy