【题目】With the city ________ clouded by dirty smog, the government has planned to shut down the four major coal-fired power plants.
A. abruptly B. frequently
C. occasionally D. regularly
在线课程【答案】B
【解析】
试题分析：考查副词。随着城市频繁的被肮脏的烟污染，政府计划关闭四个燃煤发电厂。 A. abruptly突然地；B. frequently频繁地；C. occasionally偶然地；D. regularly习惯地。根据句意可知选B。