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To live a low-carbon life , we must try to save _____ energy and produce ____ carbon .
A．more , lessB．less , moreC．more , fewerD．most , least
A
energy，carbon 為不可數(shù)名詞,more和less，后接不可數(shù)名詞，又根據(jù)意思，故選答案為A。
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