题干
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
答案(点此获取答案解析）
C
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
