I hope you will write to me soon.(soon可以由下列哪个词或短语代替)

问题描述:

I hope you will write to me soon.(soon可以由下列哪个词或短语代替)
A.just now
B.before long
C.after a long time
D.before
Why?

B before long,顾名思义是在长时间之前,自然就是”不久”了.