—Why are you so nervous?
—To our great surprise, we found by the strangers.
A. we monitored
B. ourselves monitored
C. us to monitor
D. ourselves monitoring
网友回答
A. we monitored
(答案→)B. ourselves monitored
C. us to monitor
D. ourselves monitoring
解析：本题考查非谓语动词。本题考查过去分词作宾语补足语，find sb done发现某人被……，句意：让我们很吃惊的是，我们发现被监视了，选B。