________ for the terrible accident, as the workers thought, the director felt nervous and was at a loss

what to do.[ ]

A. Having blamed  

B. To blame

C. Being to be blamed  

D. Being to blame

TGT—500型台秤单个增铊质量最小的是（），当游铊移至零刻度时，若置于增铊盘上，它能平衡承载器上的物质是25KG。