Some panies 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
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(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”。