A lowcarbon(低碳)lifestyle has an effect our daily life. People are paying more and more attention to energies these days.A.in; saveB.in; savingC.on; saveD.on; saving
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D解析动词短语的考查，第一个空格应是介词，on,固定短语have an effect on,第二个空格应填saving，因为paying more and more attention to中的to 是介词，故填saving。固定结构pay attention to doing sth.