The murderer was brought in with his hands behind his back. A. being tiedB. having tied

问题补充：

The murderer was brought in, with his hands behind his back.

A. being tied

B. having tied

C. to be tied

D. tied

答案：

A. being tied

B. having tied

C. to be tied

(答案→)D. tied

解析：tied表示动作已经完成；being tied表示动作正在进行；to be tied表示动作将要进行。