by high mountains, the city is infamous for air pollution.
A. Surrounding
B. To be surrounded
C. Surrounded
D. Having surrounded
网友回答
A. Surrounding
B. To be surrounded
(答案→)C. Surrounded
D. Having surrounded
解析：考查非谓语动词。be surrounded by被……包围，在句中作状语，相当于The city is surrounded by high mountains。句意：被高山所包围，这座城市以空气污染而闻名。根据句意说明C正确。