题目内容：

Only then___how much damage had been caused A:did she realize B:had she realized

优质解答

答案是A
倒装是毫无疑问了
主要是用DID 还是 HAD
这个语境 只是那时候 并没有需要用完成时态的语义 所以就是过去那一会 故 A