we were surpised when we saw the factory,we had imagined it _much bigger A having been B to be C be D being答案是B

问题描述:

we were surpised when we saw the factory,we had imagined it _much bigger A having been B to be C be D being答案是B

imagine to be是固定搭配 和think 一样的
在这个句子中,也没别的可选.