问题
选择题
____ to reach the headmaster on the phone, the student sent an email instead.
A．being failed
B．Having failed
C．Failed
D．To fail
答案
B
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。
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