— What’s wrong with you, sir? — My flight ______ ten minutes ago. What should I do?
-Why not go to see the dolphin show with me?-Because I _______ it.
-Have you written anything on Chinese traditional food so far?-__________, but I have a plan for it.
-Excuse me, does Mr Smith’s son live here?-He _________ be here, but he has moved.
- Is your father in?- No, he ______ for three hours.
— I can help you with your English. —___________.