—It’s a long timeI saw you last.—Yes and what a pity it is now that it will be a long time

问题补充：

—It’s a long timeI saw you last.

—Yes，and what a pity it is now that it will be a long timewe see each other again.

A. before；since

B. since；when

C. since；before

D. when；before

答案：

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。