题目内容：

( )the classroom , he found all his classmates had already been( )there
A.to enter ,sitting B.entering,seated C.entered,seat D.entering,seating

优质解答

选B(Entering) the classroom,he found all his classmates had already been (seated).1 填entering的原因是 这里是现在分词做伴随壮语2 填seated的原因是 seat是及物动词,常以被动形式表示主动意义.例：He is seat...