The book was published( )it was written.

问题描述:

The book was published( )it was written.
A.soon before B.long before C.before long D.soon after
该题正确答案应选D,为什么不能选C,它们都有不久之后的意思啊,

after 一般多用于过去的,已经发生过的
before long则是 将要,不久将要