---It’s a long time I last saw you.---Yes and it will be another month we can meet agai

问题补充：

---It’s a long time I last saw you.

---Yes, and it will be another month we can meet again.

A. before; when

B. when; since

C. since; while

D. since; before

答案：

A. before; when

B. when; since

C. since; while

(答案→)D. since; before

解析：考查连词。Before在……之前；when当……时候；since自从……以来；while当……时候；句意：自从我上次见过你以来，很久了。——是的，在我们又见面之前又有一个月了。结合语境可知选D。