My computer began to return to the ________ running state after I killed the virus by newly-updated Kill 3000．

1. A.
   normal
2. B.
   ordinary
3. C.
   usual
4. D.
   common

 My computer began to return to the _____ running state after I killed the virus by newly-updated Kill 3000

A. ordinary             B. normal             C. usual               D. common