the meeting room, he found all the parents already there.
A. To enter, sitting
B. Stepping into, to seat
C. Entering, seated
D. Entered, seat
网友回答
A. To enter, sitting
B. Stepping into, to seat
(答案→)C. Entering, seated
D. Entered, seat
解析：句意,他进入会议室，发现家长们已经坐在那里了。非谓语动词作状语，主要看非谓语动词和主语的关系。现在分词作状语多表示主动,正在进行的动作,过去分词作状语，表示被动和完成.不定式作状语通常表未来，he和enter是主谓关系，故用现在分词作伴随状语，故选C。