—Do you think the thief entered through the window?—No, if he had, I don’t believe, _______ broken the living-room’s window.

You _________ be right, but I don’t think you are.

 — There's someone outside. Who it be ?— It must be Mary. She promised to come over at 8: 00.

 —Is there a fog in the evening ?—There _____ be . I’ll make a phone call to find it out .

Thank you for giving me a hand. I ______ in the experiment without your valuable help.