— Can I pay the bill by check?— Sorry, sir. But it's the management rules of our hotel that payment ______be made in cash.

If you _____ smoke, please go outside because this is a non-smoking office.

He bought some books in the bookstore and his father________ him a lot of money.

You ________ be hungry already — you had lunch only two hours ago!

---There _____ anybody in the room. --- Why do you say so? --- Because the door is locked.