It shames me to say it,but I told a lie when _____ at the meeting by my

boss.                                                           [      ]

A. questioning                                

B. having questioned  

C. questioned                                  

D. to be questioned

“初，蜀民以铁重，私为券……始，益州豪民十余万户……用一色纸印造，印文用屋木人物，铺户押字，各自隐密题号，朱墨间错，以为私记。”这段史料讲述了

A．造纸术的产生过程

B．活字印刷术的发明

C．纸币“交子”的生产过程

D．圆形方孔钱的铸造过程