___________ the classroom,the students went to the playground to watch the football match. A.
问题描述：
___________ the classroom,the students went to the playground to watch the football match. A.
___________ the classroom,the students went to the playground to watch the football match.
A.To clean B.Having cleaned C.Cleaned D.Cleaning
答
选C
clean 的动作发生在谓语动词went 之前,因此用现在分词的完成时作状语.
句意：打扫完教室后学生们去操场上看球赛去了.