______ around the Water Cube, we were then taken to see the Bird's Nest for the 2008 Olympic Games.
A.Having shown
B.To be shown
C.Having been shown
D.To show
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C解析解析：考查非谓语动词。此处是非谓语动词作状语，逻辑主语是句子的主语we，非谓语动词与逻辑主语之间是被动关系，而且根据意思非谓语动词表示的动作在谓语动词动作之前已经完成，应该用过去分词或v-ing的完成被动式，选C。A项不表被动；B项非谓语动词用错；D项非谓语动词错，且未表被动。