Some companies are thinking of ways to save natural by making better use of the water use

问题补充：

Some companies are thinking of ways to save natural by making better use of the water used in the bathroom.

A. resources

B. sources

C. power

D. energy

答案：

(答案→)A. resources

B. sources

C. power

D. energy

解析：考查名词辨析。resource”资源”,natural resources指“自然资源” source“来源, 出处；河流的源头, 发源地”。power“力量，权力, 势力; 能力,体力”。energy“能量, 能源；精力，活力, 干劲”。