by the clear waters, this forest provides visitors with a wonderful chance to see some endangered native birds in the wild.
A. Being surrounded
B. Surrounding
C. Surrounded
D. To be surrounded
网友回答
A. Being surrounded
B. Surrounding
(答案→)C. Surrounded
D. To be surrounded
解析：分词的动作“Surround”与逻辑主语“this forest”之间是被动关系，故用过去分词作原因状语。