—Jack is not in the office at the moment—Oh, he ______ those who are going to take the driving test in an hour.

 — Mary, whose photo is it?—It ______ be Lu’s. Those are her parents.

________ we go to the McDonald's? I'm sick of the food there.

If you _______ carry with you the belief that all you do is right, it’s none of my business.   

-- ________ you tell me how to write it in English?-- I'm sorry, I can't.