Why do you look so worried?-My computer broke down and my essay ________ unfinished since．[ ]

Mary ________into the deserted building by herself on so dark a night.

Money and education change Pip. Before long he becomes vain and ashamed of his background and dislikes it _______ Joe comes to visit him in London.

The old lady didn’t know whenthe house caught fire.

We _______ in the office