Tom was badly injured in the accident last week. A new manager to take his place since the

网友回答

A. has been arranging
B. has arranged
C. was arranged
(答案→)D. has been arranged
解析：句意：上个星期汤姆在事故中受伤严重，自从那时一个新的经理已经被安排代替他的位置。和since then连用，用现在完成时，而且manager和arrange这里是被动含义，所以选D。