题目内容：

The store was broken into last night.It was a long time____the own discovered what had
happened.
A.before
B.until
C.since
D.when

优质解答

The store was broken into last night.It was a long time__D__the own discovered what had
happened.
A.before
B.until
C.since
D.when
希望能够帮到楼主