建设单位应自工程竣工验收合格之日起（）日内，向工程所在地的县级以上地方人民政府建设行政主管部门备案。
A.15
B.30
C.45
D.60
参考答案：A
公文处理的基本任务是( )公文。
A．撰写
B．传递
C．办理
D．保管
E．整理
Not I but Tom ________ for the car accident. [ ]
A. was to blame
B. were to blame
C. was to be blamed
D. were blamed
