——Who’s that man? Is he Mr. Brown?——That    be Mr. Brown. He never walks this way.

--The man in a black suit _______ be our youth worker. -- I’m sure it _____ be him. I saw him in the laboratory building some minutes ago.            

— __________ we leave the library before 5 o’clock?— No, you needn’t. You can stay here until 5:30. 

The Internet is really ________ to us. We can get a lot of things from it.

—Excuse me, Mr. Brown. ______ you speak Chinese?—Yes, butt only a little.