---It has been ages I last saw you. --- Yes. And it will be long we meet again.A. when;

问题补充：

---It has been ages I last saw you.

--- Yes. And it will be long we meet again.

A. when; before

B. since; before

C. after; before

D. before; since

答案：

A. when; before

(答案→)B. since; before

C. after; before

D. before; since

解析：连词辨析。When当……时； before在……之前since自从……以来；after在……之后。句意：自从我上次看见你已经有几年了。——是的，并且我们再见面之前还会有很久。故选B。