----- Where is Jack?.-----He______ be in the reading room .I saw him just now.

----Will Barbara come to our party? ----I am not sure, because he ____ go to the concert with his friend.

You’d better ________ right after supper.

--- I hope Jim won’t mind lending you his new digital camera. --- He ___________. I have already borrowed one from my cousin, David.

Is that your best friend Kitty?— No, it _________ be her. She flew to Singapore yesterday.