【基本電學王】評論
(A) Reduce trash as often as possible.盡量減少垃圾(B) Use water more wisely.聰明用水(C) Make traffic better.改善交通(D) Teach students how to sort clothes.教學生衣物分類Take shorter showers. Wait until you have a lot of clothes to wash before using the washing machine. Finally, try to reuse the water you wash rice or vegetables with to water flowers or plants. 這段落都是跟用水有關係的，因此選B