When I got into the room, Green was talking _________ the phone.
We have done things we ought not to have done and ______ undone things we ought to have done.
— Why weren't you at the meeting?— I ________ for a long distance call from my sister in America.
She will have to find some other work for she can't ________ this loud noise any more.
The boy said ________ couldn't he work out the problem but his teacher didn't know how to do it.
.Carol said that the work would be well done by the end of October, ________ personally I wondered completely.