问题
选择题
___ by thick bamboo and high forest, the ancient city hadn’t been discovered until the 1990s.
A．Surrounding
B．Surround
C．Surrounded
D．Having surrounded
答案
答案：C
动名词表示主动意思，过去分词表示被动含义，这里有被竹子及高树环绕的意思所以选B。被浓密的竹子和高大树木环绕，……