The news shocked the public, to great concern about students’safey at school.
A. having led
B. led
C. leading
D. to lead
网友回答
(答案→)A. having led
B. led
C. leading
D. to lead
解析：现在分词表示正在进行的动作,不定式表示具体某一次的动作,根据题意这个动作从过去已经发生,并且现在正在进行,故用完成时态的现在分词.选A,这个消息震惊了公众,已经引起了对于学生在校安全的巨大关注.