He________ the pencil and began to draw the beautiful surroundings on a sheet of paper.[ ]

A. sharpened  

B. has sharpened

C. would sharpen  

D. was sharpening

制定安全生产责任制要根据本单位、( )、( )、岗位的实际情况，明确、具体，具有可操作性，防止形式主义。

A．行业；部门
B．部门；行业
C．部门；班组
D．班组；部门