You can make a complaint to the local government ___ you are happy with the way they deal with the matter.

You can make a complaint to the local government ____you are happy with the way things are.

A.unless            B.if           C. once         D. as  

You can make a complaint to the local government ___ you are happy with the way they deal with the matter.

A．unless            B．if                C．once             D．as

You can make a complaint to the local government _____ you are happy with the way things are.

  A. unless            B. if      C. once                             D. as

You can make a complaint to the local government ___ you are happy with the way they deal with the matter.

1. A.
   unless
2. B.
   if
3. C.
   once
4. D.
   as