It is a long time they separated but it won’t be long they meet again.A. since; beforeB.

问题补充：

It is a long time they separated, but it won’t be long they meet again.

A. since; before

B. after; when

C. since; when

D. after; before

答案：

(答案→)A. since; before

B. after; when

C. since; when

D. after; before

解析：考查连词，句意：自从他们分开很长一段时间了，但是不久他们就会在见面的。这是两个固定句型。It is + 时间段+ since+ 一般过去式，自从什么有一段时间了，it won’t be long before 不久就，所以选A。