Many of them turned a deaf ear to his ad-vice,_________ they knew it to be valuable.
_________ away the old books and __________ me that new one.
Mr Li would like to _________ us an interesting story.
It was not until he came back _____ he knew the police were looking for him.
Was _____ that I saw last night at the concert?
It is _____ my father worked _____ I work now.