I really didn’t know who____ for the broken window, for none of them admitted that he had done it. 

It doesn’t matter how much loss we have suffered; just avoid _____ the mistake again.

-- What’s the matter with you? ---____ the window, my finger was cut unexpectedly.

I would appreciate________back this afternoon so that we can reach an immediate decision.

When I opened the door, I found my father ______ in his chair, completely ______ in a magazine.