around the lab, we were taken to see the library.
A. Being shown
B. Showing
C. Having been shown
D. To show
网友回答
A. Being shown
B. Showing
(答案→)C. Having been shown
D. To show
解析：考查非谓语动词用法。We 和show构成被动的关系，而且show around the lab是一个已经完成的动作，使用完成式的被动形式。句意：被带领着参观完实验室以后，我们被带着去参观图书馆。