The robot Tony was said already in Larry’s house before he returned.
A. to test out
B. to have been tested out
C. to be tested out
D. to be testing out
网友回答
A. to test out
(答案→)B. to have been tested out
C. to be tested out
D. to be testing out
解析：考查句型：sb/sth is said to do/to have done,如果是将要做，用不定式一般式to do如果是已经做了，用不定式的完成式，句意：据说机器人Tony在回来前已经在Larry的家里做过实验。Tony和test out是被动关系，用不定式完成式的被动。选C。