问题补充:
Tom was badly injured in the accident last week. A new manager to take his place since then.
A. has been arranging
B. has arranged
C. was arranged
D. has been arranged
答案:
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。