When the police broke into the room, they were terrified at the scene: a middle-aged man lying on the         floor, with a cupboard _______him, his feet and hands ______ tight with electric wires, his throat _____ open and a pair of scissors ______ deep in the chest.      [ ]

A. covered; tied; cut; cut                      

B. covering; tying; cutting; cutting  

C. covering; tied; cut; cutting                  

D. covered; were tied; cut; cutting

大气污染综合防治？