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We are sure everying here ____by the time you come back from

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