The government has been under growing pressure to the causes of air pollution as smog frequently smothers the country’s large cities.
A. release
B. schedule
C. address
D. maintain
网友回答
A. release
B. schedule
(答案→)C. address
D. maintain
解析：句意：当雾霾频繁地出现在大城市，政府一直面临越来越大的压力来解决空气污染的成因。address意为“处理，对付”，release意为“释放；放出”，schedule意为“安排，计划；将……列入计划表”，maintain意为“维持；继续；维修；主张”。