老师您好,我这有一道题,答案是c
The three men tried many times to sneak across the border into the neighboring country, ___ by the police each time?
A. had been captured B. being always captured?
C. only to be captured D. unfortunately captured
但是老师,我觉得 D 选项也对,就是不知道为什么?
希望老师给予指导,谢谢老师!