As the idea of low-carbon life is now accepted, more and more people
travel by public transport.
A. mainly
B. slightly
C. widely
D. deeply
网友回答
A. mainly
B. slightly
(答案→)C. widely
D. deeply
解析：句意：因为低碳生活思想被广泛接受，越来越多的人采用公共交通方式出行，widely：广泛地；mainly：主要地；slightly：轻微地；deeply：深地。