to reach the headmaster on the phone, the student sent an email instead.
A. being failed
B. Having failed
C. Failed
D. To fail
网友回答
A. being failed
(答案→)B. Having failed
C. Failed
D. To fail
解析：考查非谓语动词。逻辑主语为the student与fail为主动关系，故用现在分词作状语，根据句意用其完成时，选B。