As the quality of the city’s air continues to give rise to , the residents are encouraged to set off fewer fireworks.
A. descriptions
B. concerns
C. promise
D. emergency
网友回答
A. descriptions
(答案→)B. concerns
C. promise
D. emergency
解析：名词辨析。A描述，描写；B担心，担忧；C妥协；损害；D紧急情况；句意：随着城市的空气质量引起了越来越多的担忧，居民们被鼓励少燃放烟花爆竹。根据句意说明B正确。