— We got here Tuesday afternoon.— _____ Why didn’t you call us earlier?
The boy said ________ couldn’t he work out the problem but his teacher didn’t know how to do it.
She will have to find some other work for she can’t ________ this loud noise any more.
— Why weren't you at the meeting? — I ________ for a long distance call from my sister in America.
We have done things we ought not to have done and ________ undone things we ought to have done.
Paper produced every year is ________ the world’s production of vehicles.