这句子不完整,
didn't 后面少了一个单词：We didn't ( ) where we were at the time
空可以是 know,see,ask,等等.
We didn't know where we were at that time.
我们不知道我们那时候在哪里.
We didn't see where we were at that time.
我们没看到我们那时候在哪里.
We didn't ask where we were at that time.
我们没有查问我们那时候在哪里.