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¡¡¡¡economic choices78advertising. Most newspapers

¡¡¡¡depend on advertising for their very79.News

¡¡¡¡papers is sold at a price that80even a small

¡¡¡¡fraction of the cost of production. The main81of income for most newspapers is commercial advertising. The82in selling advertising depends on a

¡¡¡¡newspaper¡¯s value to advertisers. This83in terms of circulation. How many people read the newspaper? Circulation depends84on the work of the circulation department and on the services or entertainment85 in a newspaper¡¯s pages. But for the most part, circulation depends on a newspaper¡¯s value to readers as a source of information 86 the community, city, country, state, nation, and worldª²and even outer space.

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¡¡¡¡70.[A] reason[B] cause

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¡¡¡¡77.[A] entertain[B] encourage

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¡¡¡¡79.[A] forms[B] existence

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