We had to be patient because it＿＿＿some time ＿＿＿we got the full results.
A. has been ； since
B. had been ； until
C. was； after
D. would be ； before
网友回答
A. has been ； since
B. had been ； until
C. was； after
(答案→)D. would be ； before
解析：在it ＋be＋一段时间＋before／after／since句型中，before从句中的动作经过该段时间后才会实现；after从句中的动作完成后已经过去了一段时间；since从句中的动作完成后到现在已经有一段时间了。