I find the lecture I attended in the Nanjing Normal University yesterday difficult .
A. understand
B. being understood
C. understood
D. to understand
网友回答
A. understand
B. being understood
C. understood
(答案→)D. to understand
解析：这题考查的是句型：Sb find sth +adj+to do“这里的不定式是主动表被动”，
句意是：我发现昨天在南京大学听的演讲很难懂。选D。