问题
选择题
If you don't know that _________ is the mother of success, your are sure to be ________ in life.
A．failure; failure
B．a failure;a failure
C．a failure; failure
D．failure; a failure
答案
答案：D
本题考查failure的用法。failure作“失败”讲是不可数名词，作“失败的人(或事)”讲是可数名词。