问题
选择题
. _______ the meeting room,he found all the parents already _______ there.
A．To enter; sitting
B．Stepping into;to seat
C．Entered; seat
D．Entering;seated
答案
D
考查非谓语动词的用法。enter的逻辑主语是句子的主语he,而且该动作发生与found同时发生。seated 为过去分词,作宾语补足语。