问题补充：
John received an invitation to dinner, and with his work , he gladly accepted it.
A. finished
B. finishing
C. having finished
D. was finished
答案：
(答案→)A. finished
B. finishing
C. having finished
D. was finished
解析：考察with的符合结构。With +n doing表主动或者同时发生 with n done表被动或者已经发生 with n to do 表动作发生在将来
该句中根据he gladly accepted it,可知，他的工作已经结束了，所以选择A，表示工作已经做完
