Unluckily，he failed________the final exan．
A.to pass
B.passing
C.past
D.to passing
网友回答
A解析分析：fail后面跟动词不定式作宾语，所以选A项。(延伸)He failed to pass the final exam．＝He failed in the final exam．＝He was not able to pass the final exam．＝He couldn't pass the final exam．