All the homework , the students went to see the movie Black Hawk Down.
A. had been done
B. having been done
C. had done
D. having done
网友回答
A. had been done
(答案→)B. having been done
C. had done
D. having done
解析：考查独立主格结构，两句话之间没有连词，后面是个完整的句子，可知前面是独立主格结构做状语，逻辑主语homework和finish是被动关系，而且是先完成作业，学生才去看电影。用分词的完成被动式，选B。