—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
1 haven't got a single ______from Aunt Mary since I last saw her.
When and where to go for the on-salary holiday ______ yet.
By all _________, you must try every _________ to help him.
His behavior at the dinner party last night seemed rather _____. Many of us were very surprised.
Tom has six _____ books, two _____ are storybooks.