•Save energy by turning off lights that you are not using.
•Save water by turning off the faucet while you brush your teeth.
http://www.factmonster.com/ipka/A0775891.html
的Reduce
的Point 6,7
點解佢地既Save 5使加ing 變Gerund ?????????????????????????請help me
to 解釋 and 簡介一下Gerund的用法5該!!!5該!!!