34. —Jack, I want to change my job. You know I haven’t achieved anything since I took up teaching.

— Really? There is not a job considered the best one! As we all know, ______!

A. misfortunes tell us what fortune is.

B. all is well that ends well.

C. if a thing is worth doing it is worth doing well.

D. every profession produces its own best.

34. —Jack, I want to change my job. You know I haven’t achieved anything since I took up teaching.
— Really? There is not a job considered the best one! As we all know, ______!