A low-carbon lifestyle is of great benefit to improve world environment. Nothing can be enjoyed from it until you have deep understanding of it, though.
A. a; the
B. /; a
C. the; /
D. the; a
网友回答
A. a; the
B. /; a
C. the; /
(答案→)D. the; a
解析：考查冠词.结合语境可知上文特指世界的环境,故用定冠词.下文泛指任何中深入的理解,故用不定冠词,选D.