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.

针对确认不需专业处理的质量问题，应能保证它不构成对工程安全的危害，并满足安全和使用要求，并（）的同意。

A．监理单位

B．施工单位

C．设计单位

D．设计单位和建设