The building had once known _____.第一次做我选了A

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Thebuildinghadonceknown_____.第一次做我选了AThebuildinghadonceknown_____.第一次做我选了AThebuildinghadonceknown___

The building had once known _____.第一次做我选了A
The building had once known _____.

第一次做我选了A

The building had once known _____.第一次做我选了A
D.
prosperity“繁荣”,作主语补语
A.prosperity是不可数名词 .
B.prosperous 是形容词,后面加名词.
C.不是特指.