60.　 _______ you apologize for what you have just said _______ it is all over between us.

A. Either…or　　　　 B. Not only…but also　　　　　 C. Whether…or　　　　　　 D. Neither…nor

59.　 Mary ________ my letter, otherwise she would have gone to the concert.

A. has received　　　　　　　　　　　　　　　　　　　　　 B. ought to have received

C. couldn’t have received　　　　　　　　　　　　　　 D. shouldn’t have received

58.　 You’d better change another book, because _______ page of the book is torn, and _______ cover looks very old.

A. the…the　　　　　　 B. a…a　　　　　 C. a…the　　　　 D. the…a

57.　 So funny ________ that everybody burst out laughing.

A. she looked　　　　　 B. was she looking　　　　 C. did she look　　　　　　　 D. had she looked

56.　 You look not a bit older than you did five years ago. How do you _________ so young?

A. change　　　　 B. grow　　　　　 C. become　　　　　　 D. stay