We are sure everying here ____by the time you come back from abroad in a few years.

问题描述:

We are sure everying here ____by the time you come back from abroad in a few years.
A.had changed B.will have changed C.had been changed D.wil have been changed
请说明原因,

B为什么不用被动语态?选择D 不行吗?everying 不是指物吗?事情改变,用主动,不用被动。