How many times have you found yourself arriving at school to start your day, only that you left your homework at home?
A. having discovered
B. discovering
C. to discover
D. Discover
网友回答
A. having discovered
B. discovering
(答案→)C. to discover
D. Discover
解析：考查非谓语动词。句中不定式only to do表示意想不到的结果，故选C。