＿＿＿,the students put away their books,rose from their seats and l_英语解答

＿＿＿,the students put away their books,rose from their seats and left the classroom
A.As class being over
B.Class being over
choose B .why?

人气：414 ℃　时间：2020-03-19 14:42:56

解答

class being over,现在分词表伴随状态.
如果是A,要改为,as class was over,因为as后接句子.