问题描述：
after（ what ）seemed to be a long time ,the old man went out of the professor's sitting room
A it B that C which D what 所选答案是非限,但如何分析句子成份啊?
A it B that C which D what 所选答案是非限,但如何分析句子成份啊?
问题解答：
我来补答展开全文阅读