Don’t be d____________. Failure is the mother of success.

If you don’t know that _____ failure is the mother of success, you are sure to be _____ failure in life.

If you don’t know that _____ failure is the mother of success, you are sure to be _____ failure in life.

A．/; /              B．a; a              C．a ; /              D．/; a

If you don't know that _________ is the mother of success, your are sure to be ________ in life.

If you don’t know that _____ is the mother of success, you are sure to be _____ in life.

　 A. failure; failure　 　 B. a failure; a failure 　 C. a failure; failure 　 D. failure; a failure

If you don’t know that _____ is the mother of success, you are sure to be _____ in life.

　 A. failure; failure　 B. a failure; a failure C. a failure; failure D. failure; a failure

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

 If you don’t know that ____is the mother of success, you are sure to be____ in life.

A. failure, failure     B. a failure, a failure  

C. a failure, failure   D. failure, a failure