It will be quite a long time she is back again,so don’t be too cross with her.
A. that
B. since
C. before
D. until
网友回答
A. that
B. since
(答案→)C. before
D. until
解析：﹡It will be quite a long time before…… 将过很长时间才……
It will not be long before…… 不要多久将会……
It was long before …… 过了好久以后才……
It was not long before…… 不久就……