When Sue returned to her office, she found the window open and s

When Sue returned to her office, she found the window open and something（ ）.
A、to be stolen
B、stolen
C、to steal
D、stealing
【正确答案】：B
【题目解析】：-ed分词。-ed分词表完成，to be done是未完成。本句意为当苏回到办公室时，她发现窗户开着，有些东西被偷了。