It will be 2 years we see each other again.A. afterB. before C. sinceD. when

问题补充：

It will be 2 years we see each other again.

A. after

B. before

C. since

D. when

答案：

A. after

(答案→)B. before

C. since

D. when

解析：after在……之后；before在……之前；since由于，自从……以来；when既然，当……时。句意：在我们再次见面之前，将会有两年的时间。结合语境可知选B。