--It is a long time I saw you last year.
--Yes. And it will be some time we see each other again.
A. when; after
B. after; when
C. since; before
D. before; since
网友回答
A. when; after
B. after; when
(答案→)C. since; before
D. before; since
解析：考查状语从句连接词。句意：--自从去年见过面一后，我们很长时间没见了。--是的。再次见面，（恐怕）还要过一段时间。since自从；It is/has +时间+since+含过去时的句子，自从......，已经多久了。Before“在......之前，还要过一段时间”。故选C。