(2013·合肥一检)According to the rules and regulations, all payments ________ be made in cash in the shopping center.

If you know nothing about the famous program called Where are we going, dad?, you ______be living in a box!

-----Do you know where David is ?  I couldn’t find him anywhere.-----Well. He _______have gone far-----his coat’s still here.

 No student ______ go out of the school campus after 10:00 at night without permission according to the school regulations.

____ I fill in the application form right now, sir? No, you needn’t. You can complete it this afternoon.