.  All that can be done ______.

A. has done    B. has been done    C. have done    D. have been done

All that can be done ______.

A.has done　　 B. has been done　　　　 C. have done　　 D. have been done

All that can be done ____.

        A.has been done     B.have been done   C.have done     D.has done

 All that can be done _______.

    A. has been done    B. has done         C. have done           D. were done

 All that can be done _______.

    A. has been done    B. has done         C. have done           D. were done