从句语法题:填一个连词

问题描述:

从句语法题:填一个连词
I was a long time ____ we had had a wonderful time together several years before.
对 it was a long time
不过不会是that吧

since,意为:自从几年前我们有过一段美好时光(到现在),已经很长时间了.