We have done things we ought not to have done and ________ undone things we ought to have done.
Her display of bad temper completely _____ the party.
Neither of them thought______ of him and they both tried to _____ him in his work.
They have been waiting for many hours to see the singer, but the airplane must have been _____.
The _____ of the trees in the water was very clear.
Today, housework has been made much easier by electrical _____.