Many citizens urged their government to take measures to their carbon emission to reduce greenhouse effects.
A. cut off
B. cut up
C. cut out
D. cut down
网友回答
A. cut off
B. cut up
C. cut out
(答案→)D. cut down
解析：考查词组：A. cut off切断B. cut up切碎C. cut out剪去D. cut down减少，句意：很多居民强烈要求政府采取措施，减少碳排放来较少温室效应。选D。