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

If you have finished most of the work, you ______ start working so early tomorrow.

—The government should try to balance economic growth and pollution from industry.—____. It’s time to do it.

Sir, you_______ be sitting in this chair! It is just for women with children and old people only.

--- Isn’t it Ann’s husband over there?---- No, it ______ be him---I’m sure he doesn’t wear glasses.