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
网友回答
A. failure; failure
B. a failure;a failure
C. a failure; failure
(答案→)D. failure; a failure
解析：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。