it was not until和it was until

问题描述:

it was not until和it was until
It ___ we had stayed together for a couple of weeks ___ I found we had a lot in common.
选项 A.was until ; that
B.wasn't until ; that
答案是选B,但是我怎么感觉两个意思一样呢?

B
it was .that ...这是强调句
not until 直到.才.这个我知道啊。 能不能把两个选项都代入翻译一下呢?谢谢!not until 直到。。才。。而until 是直到。。为止如果选A的话,意思就是我一直都觉得我们有很多共同支出,直到我们相处几周后,我就不这么觉得了。