Taiyuan，a city in North China，was struck by a heavy snowfall last week， serious traffic problems.
A. to face
B. faced
C. facing
D. having faced
网友回答
A. to face
B. faced
(答案→)C. facing
D. having faced
解析：考查现在分词作状语，在这里作结果状语。句意：太原，中国北方的城市上周被大雪袭击了，结果面临着严重的交通问题。故选C。