— It was Sunday today, and I _____ up very early.

— So you really had a good rest. [ ]

A. didn't need to get

B. needn't have got

C. needn't to get

D. don't need get

锅炉进行冷态试验的目的是为了确保炉内形成良好的空气动力工况，并作为运行调节的依据。