21. Move a few steps, and the oil-paintings look better ______.
I think that he must be looking up the information in the library, ______?
I hope she gives up her job ______ it makes her crazy.
I can’t advise you what to do; you must use your own ______.
I don’t like talking on ______ telephone; I prefer writing ______ letters.
She keeps a supply of candles in the kitchen in case of power ______.