I’m feeling much better now so you ______ call the doctor.

 —“Crash diets” make us lose weight fast and I am all into that. —But it_______better to work out.　   

You’d better put away the magazines you have read, for they _______ be of great use later.

---Look at that girl! Is that Susan?---No , it _______ be her. She has gone back to her hometown.

You_____ all those calculations! We have a computer to do that sort of thing.