The headmaster asked the boy to apologize ______ the teacher _______ what he had done, but he refused to.
Only when _________ be possible to sign the papers.
Glasses are __and must be handled with great care.
The school rule states that no child shall be, unless _by an adult, allowed out of the school during the day.
Stephen Hawking believes that the earth is unlikely to be the only planet life has developed gradually.
What a pity! When we got to the cinema, the movie Let the Bullets Fly _________, so we saw only the end of it.