－ Must I clean my rabbit’s hutch every day?－ No, you ____________.

---Must Jack come to sign his name on the paper?---Yes, he_____ .

 —I think the man over there must be Bob.—It ______ be him. He has gone to Paris.

— Must I finish my homework now?— No, you ________. You can go home now.

--The man in a black suit _______ be our youth worker.--- I’m sure it _______ be him. I saw him in the laboratory building some minutes ago.