He seemed _______what had happened . A to know B know C knows D knowing选啥求解释仔细些
问题描述：
He seemed _______what had happened . A to know B know C knows D knowing选啥求解释仔细些
答
A
seem to do 是固定搭配.
翻译：他看起来似乎知道 发生什么事了.