—It’s a long time I saw you last.
—Yes，and what a pity it is now that it will be a long time we see each other again.
A. before；since
B. since；when
C. since；before
D. when；before
网友回答
A. before；since
B. since；when
(答案→)C. since；before
D. when；before
解析：考察固定句型。It is a long time since…自从…以来已经很长时间了；it be+一段时间before从句；一段时间以后某事才发生。结合句意可知C正确。句意：—自从上次见到你已经很长时间了。—是的真遗憾啊！很长一段时间以后我们才又见面。