To live a low-carbon life we must try to save energy and produce carbon .A. more les

问题补充：

To live a low-carbon life , we must try to save energy and produce carbon .

A. more , less

B. less , more

C. more , fewer

D. most , least

答案：

(答案→)A. more , less

B. less , more

C. more , fewer

D. most , least

解析：energy，carbon 为不可数名词,more和less，后接不可数名词，又根据意思，故选答案为A。