单选题Itisalongtime________theyseparate

单选题 It is a long time ________ they separated, but it won’t be long ________ they meet again.A.since, beforeB.after, whenC.since, whenD.after, before

A解析试题分析：句意：自从他们分开已经很长时间了，但是没过多久他们又相见了。Since自从，前面的主句也可用现在完成时；it won’t be long before…没过多久就…….这是固定句型。考点：考查固定句型的用法。点评：本题难度适中。固定句型是高考常考的知识点，需要考生平时多记多背。并且注意区分类似的句型的用法。即学即练：It won't be long ______ the Chinese people will become well off.A. before B. when C. since D. after解析：A。句意：中国人民不用多久就会变得富裕起来.

这个问题我还想问问老师呢