Simplest:

來源: 於 2013-10-09 09:14:27 [舊帖] [給我悄悄話] 本文已被閱讀：次

I'd rather not answer that question.  Is it OK?
It is not a legitimate intervewing question.  And it really doesn't help them even if you answer.  With this answer, they would guess that you have but won't contued ask you to confirm.