As I waited for my brother to arrive, I __________ the clock and saw that he was late.[ ]

A. glanced at  

B. stared at  

C. watched  

D. noticed

仓结构钢筋的放样，是根据______，将结构中各个编号的钢筋分离出来，分别计算出钢筋切断时的直线长度，各种规格的钢筋数量，以便进行备料加工。