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
He went back home without having_____any success.
A.completed
B.achieved
C.finished
D.accomplished
11.Written applications should be sent to us in case __________ some problems
with the electric version.
A.there will be
B.there is
C.there be
D.there was
13.He would have paid _____ for the house if the salesgirl had insisted
because he really wanted it.
A.twice as much
B.much as twice
C.as much twice
D.twice much as
25.Some people viewed the findings with caution,nothing that a
cause-and-effect relationship between passive smoking and cancer remains _____.
A.to be shown
B.to have shown
C.to have been
shown
D.being shown