Such is human nature that many people don’t value things they possess until they’re lost them.
—Isn’t that your boss over there? —No, it ________ be him. I’m sure he is in the office now.
How ________ you say that you really understand the whole text if you have covered only part of it?
—Many houses near the airport were destroyed by the wind. —Well, the wind ________ have been very strong.
—Must he come to sign this paper? —Yes, he_______.
Just be patient. You ________ expect the world to change so soon.