The fish on the table ______. I want to eat it right now.

The rivers will become dirtier and dirtier ______ wetake action to protect them.

The murderer was brought in ,with his hands　　 behind his back.

Where did you get this book?—I picked it up from a second-hand bookshop if you ______ know.

lookat the time! _____you play the piano at such a late hour